Alpha and Omega. In what sense does the Lord mention them?

The Revelation titles for Jesus are all taken from titles for YHWH (Jehovah the LORD) in the OT:

• Isa 41:4 - Who has performed this and carried it out, calling forth the generations from the beginning? I, the LORD—the first and the last—I am He.”
• Isa 44:6 - Thus says the LORD, the King and Redeemer of Israel, the LORD of Hosts: “I am the first and I am the last, and there is no God but Me.
• Isa 48:12 - Listen to Me, O Jacob, and Israel, whom I have called: I am He; I am the first, and I am the last.

Jesus is simply using the Greek alphabet where alpha and omega are the first and last letters. In this context the following are equivalent:

• first and last
• alpha and omega
• the beginning and the end

Thus, Jesus is effectively identifying Himself as YHWH/Yahweh/Jehovah of the OT. The book of Revelation does this quite frequently, for example

• Jesus is the Great Shepherd in Rev 7:17 (see also John 10:11-16; Heb 13:20, 1 Peter 2:25, 5:4) - compare Psalm 23:1; Eze 34:11ff, Isa 40:11, Ps 95:7, 100:3 where YHWH is the great shepherd
• Jesus is the One who Searches hearts and minds in Rev 2:23 - compare Jer 11:20, 17:10, 1 Sam 16:7 where YHWH is the same
• Jesus is Lord of Lords in Rev 17:14, 19:16 - compare Deut 10:17, Ps 136:3, 26 where YHWH is the same
• Jesus has Seven Eyes in Rev 5:6 - compare Zech 4:10 where YHWH is the same
• In Rev 1:7, Jesus is the One whom they have pierced and mourn for - compare Zech 12:10 where YHWH is described in identical terminology

The Greek letters Alpha and Omega relate a concept of from the beginning to the end, or a completeness. The use of the first and last letters of the alphabet is an idiom as in English we would say from A to Z, meaning the entire thing is encompassed.

In the Hebrew scriptures it is the Aleph and Tav which is found in the very center of Gen. 1:1 and is not translated in the Greek, Latin, or English bibles. The Lexicons try to define this as a grammatical marker pointing to the direct object of a verb. (H853). But it is not that simple. It denotes YHVH's actions, or YHVH's covenant relationship, and YHVH's will.

Excerpt from "The ALEPH-TAV" by Harold Smith:

The aleph (aleph) is the first letter of the Hebrew alephbet (alphabet), and the tav (tav) is the last letter of the alephbet. It is in the placement of these two very significant letters at strategic locations within many verses of Hebrew scripture that express the understanding of a total completeness. It is equivalent to saying "from alpha to omega, from a to z, from first to last, from beginning to end." We see the aleph-tav (aleph-tav) symbol, in association with YHVH (YHVH), used in hundreds of places in the Original Writings. One example concerning judgment is Genesis 13:10 - "destroyed YHVH aleph-tav Sodom and Gomorrah". Other examples confirming this usage can be found in Genesis 19:14, Isaiah 13:19, Jeremiah 50:40, and Amos 4:11. An example of the aleph-tav (aleph-tav). symbol rendered as a blessing is in Exodus 20:8 - "and blessed YHVH aleph-tav Day, the Sabbath". Hebrew scholars agree that originally in Paleo-Hebrew, the first letter of the alephbet, the aleph (aleph) letter meant "Strength" with its letter symbol an Ox Head. The last letter of the alephbet is the letter tav (tav), which had as its letter picture an X - a symbol or sign of "Covenant". Consequently, the aleph-tav (aleph-tav) symbol literally means "Strength of the Covenant" when used in original Hebrew text and was placed to create emphasis as a direct object pointer to the workings of YHVH (both YHVH and aleph-tav) concerning His covenant, wherever it was placed throughout the Tanakh (the Original Writings). (Source: here)

Just as is meant in Isa. 41:4, 44:6 and 48:12 speaks of the work that YHVH has done is completed. Thus, the use of the first and last letters of the alphabet in both the Greek and Hebrew scriptures denotes YHVH's complete actions of His covenants and His prophecies.

There was (and maybe still is) the brand-name Omega for a watch-making company. Clocks and timepieces of repute had the Greek symbol for 'omega' on their dials: Ω

Consider the matter of time with regard to Alpha and Omega in the Revelation. Alpha is at the very start, and Omega is at the very end of the Greek alphabet, and considering that John wrote the whole book in Greek, not Hebrew, that is why Greek letters are used. Now, with regard to time, it had to have a start for our universe, because it takes time for expansion of the universe (which it continues to do), and so time continues. But in Revelation 10:6 time (Greek chronos) "is no more." Unfortunately, although the Greek word for "delay" is kairos, and it is not in that verse, most modern translations have substituted "time" for "delay". But the Greek text tells us that there will come a point when time should be no longer.

So, time has a start (Alpha) and time has an end (Omega). As God created time, he is in control of time, and he knows when it will be "time up"; when time as we know it will end, and eternity will obtain for all souls. And, of course, at an individual level, we do not begin to exist until a certain time, when our conception starts our lives, and we must step out of time at our physical death. God determines all the days of our existence, and he knows when we shall die. But, not to wander into a related issue, and sticking with time as spoken of in Revelation, Alpha and Omega take on an interesting aspect with regard to God creating time, and determining when "there should be time no longer" (Rev. 10:6 A.V.)

However, when the claim is made that in these two texts it is Almighty God in Revelation 2:8: The words of the first and the last, who died and came to life and in Revelation 1:17b-18: Fear not, I am the first and the last, and the living one. I died, and behold I am alive forevermore, and I have the keys of Death and Hades. - it might be worth pointing out that the Father never died, nor did the Holy Spirit, but only the incarnate Son.

This means that both the Father and the Son share the title of Alpha and Omega in Revelation. I mention this because the question asks, "Why does the Lord mention the alphabet?" Both the Father and the Son mention the alphabet. And, given that the Son is the Word of God, it is utterly appropriate that the alphabet is integral to him, as the living Word, both spoken and in the inspired writings of the Holy Spirit. All three - Father, Son and Holy Spirit - are called "Lord" in holy scripture. There must be no attempts at separation, nor is there any in the Revelation.

EDIT in view of the question now having been changed: The sense meant by the Lord is "all-encompassing" - nothing left out, in other words. From "in the beginning" of Genesis 1:1 (written in Hebrew) to "when time shall be no more" in Revelation 10:6 A.V. (written in Greek), God is the sovereign Lord in and over all of everything.

Introduct

After much effort, I have come to a conclusion, which is after my mind, but I think what I say has some basis.

According to the Greek idiom “the alpha and the omega”, we mean everything; the whole case. But because I am a restless spirit, and I am not satisfied with words alone, I wanted to explore and elaborate on this matter, and thus, share it with you.

Unfortunately, it is not possible to give an answer with a short description, and so I developed it.

A (Alpha)

Shape

Looking at the Greek-Latin letter A (Ἄλφα [Alpha]), or the Hebrew-Aramaic letter א (aleph/alaph) and the Samaritan ࠀ (alaph), we can distinguish two lines, which are joined by an intermediate line (1st shape) or above to another line (Samaritan and Hebrew). Therefore, the letter A reflects “unity,” hence the number ‘one’ in Greek numerals. It is “two = one.” 𐤀‎ (Phoenician / Paleo Hebrew letter of Alpha).

The shape it symbolizes, as most say, is a cattle (bull, ram, goat, or other male animal with horns). The ancient Egyptian Hieroglyph and the Proto-Sinaitic is a cattle head with two horns. But the animal it symbolizes is not so important; what matters is the meaning of the letter. A head with two horns (= two powers), emanating from the same head, itself. There is no doubt, therefore, that the letter has to do with two aspects, which are under one branch (or one unit). The corresponding letter in Ancient South and North Arabic is 𐩱 and 𐪑 respectively, and in Ge'ez (Ethiopian) it is አ. In modern Arabic it is ا, i.e. a single unit, as in the Syriac Serta; in modern Syriac it is ܐ (two horns in one). In ancient South Arabic and Ge'ez, the two folds appear to be joined, which means that they may reflect unity, or the horns are the two lines downwards that form a Π or an Λ, where they are joined into one unit (the upper end, which may be a yoke).

As the first letter, it has the meaning of the original concept. The first stages of life, as well as the things necessary for survival, the essentials for any field. It is the basis for everything; “ἀρχή” (principle). It is the Cause that will lead us further to move forward. The basic element.

Another example is good and evil, which coexist or, better said, both accompany human life on earth. The bright side and the dark side, light and darkness. Virtue and sin, air and water, positive and negative.

It can be seen as the rule of coexistence of two different elements, because A symbolizes two different lines that coexist. Two different and equal horns that come together.

The letter A in Greek is formed by the letter Λ (Lambda) and a horizontal line connecting the two separate or diverging lines. This is called the “union of two opposite things.” This connecting line is the “factor of the coexistence of two different things.” For example, we have fire and water; how do we connect them? With a vessel such as a pot, for example, to cook. So we balance (we do Alpha-making) fire with water. It is the letter of balance. We add or use something that will unite two different things.

A = Two different great aspects in unity, or two different great forces of one

Pronunciation

The pronunciation of the name, in Greek, Hebrew, and almost all Semitic languages that use the alphabet (Arabic, Aramaic, Syriac, Samaritan, etc.), is approximately the same.

The pronunciation of the sound A in modern Hebrew (א) is simply a slight closing of the pharynx, immediately followed by an “ah” sound, pushing a slight voice through the pharynx.

The two things, internal (Ah) and external (PHA), although different (Λ/L), can coexist (A › ALPHA). Inhalation and exhalation, inside and outside, breath, breath of life, existence.

Deeper meanings

The Human

A striking example is the word “ἄνθρωπος” (human), אדם (Adam › human). Both words, Greek and Hebrew, are written and begin with Alpha/Aleph. The immaterial and the material elements united. Body and soul. Man has within him the breath of life from God (immaterial) and is a body made of matter. He has become, in other words, the “Alpha-making” (the harmony and balance).

Past & Future united

Another example is to unit the past and the future (in allegorical expression); and this is something that God can do. He differentiated the past (Israel who lives by the flesh) from the future (Israel who lives by the Spirit) and united them with himself (through his incarnation via the crucifixion). He did the A, the “alphadiasma” (the Alpha-making). The upper end of the angle can be considered as God (together with the Son/Word), from which one line (past › old Israel) and the other line (future › new Israel) emerge and join with the middle line, which is himself (God), i.e. from the crucifixion of the Lord Jesus Christ (see Ephesians chapter 2).

darkness & light united

Another example. God united the darkness of the universe with the light. He made day and night into a circle. Two equal parts, different and united.

The Alpha-making

It is the letter of absolute harmony and balance. God composed the universe with these elements. The man, who is a creation of God in His image, and who is an absolute harmony, from soul and body, makes things, buildings and contemporary artifacts by doing alpha-making. The builder and the carpenter, the plumber and the electrician, these two different types of professions, matter and energy, do alpha-making. They build a building based on the harmony and balance of two different basic elements.

Characterization of Alpha

It is characterized as the letter of the alphabet that sets the basis through the union of two great different elements.

Definition: It is the union of a set of two foundamental sources/aspects/elements by joining them with harmony and balance. Consequently, it is the main base, the fundamental principle.

Unity of two great lines/sides, two forces, two elements; immaterial & material, invisible & visible, spirit & body or soul & body, fire & water, dark & ​​light, day & night, the kingdom of heaven & the kingdom of the earth, past & future, etc.

O (O low)

In order to analyze Ω, we must first analyze O, because these letters are similar, and thus the meaning of Omega will be better understood.

Shape

According to evidence, data, and arguments from scholars, they suggest that O, which is identical to the Phoenician/Paleo-Hebrew 𐤏, is an eye. The modern Hebrew is ע and the Samaritan is ࠏ. The Old Aramaic is 𐡏‎ and the modern Syrian is ܥ. The South and North ancient Arabic is 𐪒, and the modern Arabic is ع. Greek words that prove that O is an eye and has the meaning of sight are such as: ὄρασις/ὀράω = sight/see, ὄψις = appearance, ὀφθαλμός = eye. Other meanings of O are space and time. This is also evident from the shape of the letter, because it is a circle, which signifies a frame (i.e. a space), as well as time, which turns/rolls (i.e. in the sense of a period, a year, the seasons, etc.). Words with these meanings include: ὄριον = border, region; χρόνος = time (the endings are irrelevant, only the root of the word matters, i.e. in the word ὄριον, the “-ι-” with the “-ον” is a suffix and ending, while “ὄρ” is the root of the word, as with ‘χρόνος’, where “χρόν” is the root of the word).

Pronunciation

Its archaic pronunciation must have been like the characteristic sound we make when gargling in the pharynx, but probably not an intermittent sound like gargling, but continuous, as the modern Hebrew ע (Ayn) is pronounced today. It sounds like a false or vague Greek “γ” (gh). The LXX transcribed Hebrew names such as Irad, Amora, etc. into Gairad, Gomorrah (also containing “Γ, γ” [gh]). Obviously, the grapevine of the esophagus signifies the eye, and whatever is close to it (or rather, right behind it, i.e., in the mind, in the innermost part) becomes understandable. Greek words with this meaning are: νοῦς = mind, φρονέω = I think / I have a mind or I am prudent, ὄναρ = dream (I see with my mind), ὄραμα = vision, λογισμός = thought, λόγος = estimation/opinion (through the mind) or a speech through the intellect.

Deeper meanings

The circle

The shape of the letter (O) is an important and well-known shape that definitely meant “circle” in ancient times. Everything revolves, everything is overturned, everything is in the hands of “μοίρα” (= fate); fate was certainly a widespread belief among the Greeks, and not only them, a belief in destiny. There are, of course, many Greek words from mythology whose meaning is difficult to understand, since Greece had its own mentality and beliefs and its own doctrines.

Other meanings

It also means “κοίλωμα” (= hollow) or ‘κοιλάς’ (= valley, as in a depression), “κοιλία” (= belly, as in a bulge), etc.

The meaning of the observation and knowledge

It is important to note that O has a meaning of observation, learning and intellect, experience and discipline, knowledge. All of this is done through sight. I see, I learn and I act.

The works of ancient civilizations

Ancient civilizations tended to depict their thoughts, and so they painted on vases and walls. Whatever they saw, they imitated or painted. Caves with paintings from many years BC, representations of ancient customs, mythologies, dances, etc., which are depicted in iconic representations.

The importance of the eye

The human eye is one of the most important parts of the human body, as well as one of the most beautiful and sensitive. The eyes reveal a person's heart and emotions, their thoughts. With their eyes, people read the images they see in front of them. A picture is worth a thousand words, and the eyes have this ability, so they are very important to humans. They are the first organ with which the human mind interacts and manages its thoughts in order to act around it.

Ω (O great)

Shape

If “ὄ μικρόν” (o low) is vision, then “ὦ μέγα” (o great) is hypervision. They are two eyes (ω) and not one (ο). Whatever omicron means, omega also means in a large form, in full, etc. Since the letter omicron signifies space and time, then omega signifies both the surroundings and eternity; and since omicron signifies the mind, then omega signifies the great mind.

This letter must be associated with an obsolete letter, which in Hebrew has merged into the letter ע (Ayn), and whose meaning was, possibly, a concept of sequence, continuity. In the Arabic alphabet it exists separately, both in ancient Arabic and in the modern one; in the ancient Southern and Northern Arabic alphabets, it is the grapheme 𐪖. In modern Arabic it is غ (with a dot above), while the omicron is equivalent to ع (without a dot above). There is no doubt that the lowercase Greek letter (ω) or the Common Hellenistic (Ѡ) is two eyes, and the modern Greek is perhaps the eye that sees from a distance (Ω); possibly also the shape of infinity, which has no end in time or space, because the circle expands.

Pronunciation

There is a possibility that in some archaic era it was pronounced like the Greek "γ" (gh) but on the staphylite of the esophagus, with the back of the tongue tickling it. It possibly signifies that which is in close contact with the eye (I see well, clearly).

English words include it in the letter W w (double V v / U u); water, wave, wall, window, win, we, etc. It may be related to the obsolete Latin grapheme Ȣ (two eyes, or sequence).

According to these indications, it is associated with sequence, doubling, and insight.

Deeper meanings

The Omega greater than Omicron

Ω (O great) is the formulation of Ο (O low) to a fuller degree. What was mentioned for ομικρον also applies to ωμέγα but to perhaps a double or even greater degree.

The egg in Mythology

The egg in almost all mythologies represented the formulation of the original meaning of the existence of the world. The egg in ancient Greek is written “ὠόν / ΩΟΝ”, where the subject of the word is “ὠ” and the ending is “όν” (participle of the neuter present tense of εἰμί = I am, which functions as an ending); in the Aeolian dialect “ὤιον”, and in Doric “ὤεον”, and in the argeio type “ὤβεον” and “ὤFεον”. It is therefore not excluded that they combined it with the concept of the primary element as the great O, the great egg, the cause of existence, while it has no relation (I think) to the concept of a common egg in size, because eggs are small, and therefore it should not be written with “ω” (the great); but rather it was combined with its shape, which resembles the initial cause of the existence of the world.

The greatness of Omega

Ω is associated with what has a large capacity and a lot of time. It is associated with the hypervision and the universal element. With the great mind, and with great wisdom and prudence. It has sequence and continuity because it is numerous.

The used in 1st person

It is used in the 1st person as the ending "γράφω, ὁράω, ἀναγιγνώσκω, πίπτω, ῥίπτω, etc.", because it relates to ourselves, who see the events up close and vividly and act, while in the 2nd and 3rd person it has a different ending, because we do not do it, therefore we are not aware of it.

Conclusion

I am the Alpha and Omega = I am the One from whom the principles, the powers or authorities, the visible world and the invisible, matter and energy, light and darkness, fire and water, good and evil, spring. I created them and I manage them; I laid the foundations and principles of the world (A). I ​​am also the One who sees everything diachronically and thoroughly and I constitute the universe in terms of space and time; I am present everywhere and I supervise and process with the mind. I search hearts and minds. I am the one who gives exhortations and advice. I remember everything, I know everything. I know the past and the future, and I do not break my word. I know nature and its needs; I know man inside and outside very well. Nothing escapes me at all (Ω).

ἀρχὴ καὶ τέλος = I am the main (fundamental) basis, principle, and the whole, to its end, to where everything exists.

Πρῶτος καὶ ἔσχατος = I am the whole. The one who leads the whole. First in the hierarchy and last. I represent the first and the last place; the place of primacy, and the most humiliating.

The everything

Frame

For current question, 'Alpha and Omega. In what sense does the Lord mention them?', I have the short answer: because by this letters he compares Himslef with the 'alphabet' concept.

That allows me to address the question in its initial draft, it was stated in the title: 'Why does the Lord mention the alphabet?'

Scriptural answer

The Most High Lord, Almighty God Jesus Christ compares Himself with alphabet in His attempt to teach humankind of his true essence, because humankind was created to have dominion over the world by ability to practice the WORD.

[Job 12:7-12 YLT]
⁷ And yet, ask, I pray thee, One of the beasts, and it doth shew thee, And a fowl of the heavens, And it doth declare to thee.
⁸ Or talk to the earth, AND IT SHEWETH THEE, And fishes of the sea recount to thee:
⁹ 'Who hath not known in all these, That the hand of Jehovah hath done this?
¹⁰ In whose hand is the breath of every living thing, And the spirit of all flesh of man.'
¹¹ Doth not the ear try words? And the palate taste food for itself?
¹² With the very aged is wisdom, And with length of days understanding.

[Acts 17:22-29 YLT]
²² And Paul, having stood in the midst of the Areopagus, said, 'Men, Athenians, in all things I perceive you as over-religious;
²³ for passing through and contemplating your objects of worship, I found also an erection on which had been inscribed: To God -- unknown; whom, therefore -- not knowing -- ye do worship, this One I announce to you.
²⁴ 'God, who did make the world, and all things in it, this One, of heaven and of earth being Lord, in temples made with hands doth not dwell,
²⁵ neither by the hands of men is He served -- needing anything, He giving to all life, and breath, and all things;
²⁶ He made also of one blood every nation of men, to dwell upon all the face of the earth -- having ordained times before appointed, and the bounds of their dwellings --
²⁷ to seek the Lord, if perhaps they did feel after Him and find, -- though, indeed, He is not far from each one of us, (!!!)
²⁸ for in Him we live, and move, and are; as also certain of your poets have said: For of Him also we are offspring.
²⁹ 'Being, therefore, offspring of God, we ought not to think the Godhead to be like to gold, or silver, or stone, graving of art and device of man; (i.e. He is not one specific particular thing!)

[Genesis 2:20 YLT]
²⁰ And the man calleth names to all the cattle, and to fowl of the heavens, and to every beast of the field; and to man hath not been found an helper -- as his counterpart. (i.e. the man cannot find the name for himself, being created in the image of God!)

[Genesis 2:19 YLT]
¹⁹ And Jehovah God formeth from the ground every beast of the field, and every fowl of the heavens, and bringeth in unto the man, to see what he doth call it; and whatever the man calleth a living creature, that [is] its NAME.

[Genesis 1:27-28 YLT]
²⁷ And God prepareth the man in His image; in the image of God He prepared him, a male and a female He prepared them.
²⁸ And God blesseth them, and God saith to them, 'Be fruitful, and multiply, and fill the earth, and subdue it, and rule over fish of the sea, and over fowl of the heavens, and over every living thing that is creeping upon the earth.'

Explanation

Jesus Christ is the creator of the world, therefore He is supposed to be known through all things, which are made perceivable to humankind by BEING NAMED THROUGH SPELLING WORDS.

Even 'alphabet', 'human' and 'ages' are NAMES for things created by God. Therefore, by saying 'I AM ALPHA AND OMEGA', Jesus insists that He is being found in all things of the world, including ALL alphabets, ALL nations, ALL times.

Even 'God', 'Lord', and 'Jesus' are NAMES, made with the alphabet.

Therefore, Jesus, by using this absolutely tough illustration ("image") for skilled scribes and linguists, says, that His essence is beyond even the very names 'Jesus', 'God', and 'Lord'!!!!!

[Colossians 1:15 YLT]
¹⁵ who is the image of the invisible God, first-born of all creation,

[1 Timothy 1:17 YLT]
¹⁷ and to the King of the ages, the incorruptible, invisible, only wise God, [is] honour and glory -- to the ages of the ages! Amen.

Again, Jesus, by saying 'I AM THE ALPHA AND OMEGA' states, that He is not the name 'Jesus', but far beyond that.

[John 4:24 YLT]
²⁴ (non-resurrected Jesus says) God is a Spirit, and those worshipping Him, in spirit and truth it doth behove to worship.'
²⁵ The woman saith to him, 'I have known that Messiah doth come, who is called Christ, when that one may come, HE WILL TELL US ALL THINGS;'
²⁶ Jesus saith to her, 'I am he, who AM SPEAKING to thee.'

[John 20:25-28 YLT]
²⁵ the other disciples, therefore, said to him, 'We have seen the Lord;' and he (Thomas) said to them, 'If I may not see in his hands the mark of the nails, and may put my finger to the mark of the nails, and may put my hand to his side, I will not believe.'
²⁶ And after eight days, again were his disciples within, and Thomas with them; Jesus cometh, the doors having been shut, and he stood in the midst, and said, 'Peace to you!'
²⁷ then he (resurrected Jesus) saith to Thomas, 'Bring thy finger hither, and see my hands, and bring thy hand, and put [it] to my side, and become not unbelieving, but believing.' (i.e. "go touch my fleshy body!")
²⁸ And Thomas answered and said to him, 'My Lord and my God;' (yep, God being Spirit does not disallow Thomas to touch the flesh of God!)

Hence, according to the whole Bible, and to this very saying from Revelation 1:8, 21:6, 22:13, — it is 100% correct to say that Jesus is not 'Jesus', because Jesus is 'J', while Jesus is actually ALPHA AND OMEGA.

Thus, the alphabet illustration is used in Scripture to convey very complicated and weightful point for those whose domain largely is languages and writing. It is also not a big surprise that exactly John the Apostle, "the beloved one", uses this, and exactly who wrote the book of Revelation with very complicated matter being told in it.

(Please, before trying to throw any objection against the matter expressed here, take a look into some wide and complicated talks on the topic of transubstantiation, AT LEAST! I have no opinion on that subject, but the discussion itself is very affirmative for the point that I explain in my answer here)

The phrase is always τὸ Ἄλφα καὶ τὸ Ὦ, not τὸ Ἄλφα καὶ τὸ Ὦμέγα:

"I am the Alpha and the Omega," says the Lord God, "who is and who was and who is to come, the Almighty." (1:8)
ἐγώ εἰμι τὸ Ἄλφα καὶ τὸ Ὦ λέγει κύριος ὁ θεός ὁ ὢν καὶ ὁ ἦν καὶ ὁ ἐρχόμενος ὁ παντοκράτωρ

And he said to me, "It is done! I am the Alpha and the Omega, the beginning and the end. To the thirsty I will give from the spring of the water of life without payment. (21:6)
καὶ εἶπέν μοι γέγοναν ἐγώ εἰμι τὸ Ἄλφα καὶ τὸ Ὦ ἡ ἀρχὴ καὶ τὸ τέλος ἐγὼ τῷ διψῶντι δώσω ἐκ τῆς πηγῆς τοῦ ὕδατος τῆς ζωῆς δωρεάν

I am the Alpha and the Omega, the first and the last, the beginning and the end." (22:13)
ἐγὼ τὸ Ἄλφα καὶ τὸ Ὦ ὁ πρῶτος καὶ ὁ ἔσχατος ἡ ἀρχὴ καὶ τὸ τέλος

Obviously the intent is to signify the first and the last, but spelling out the first letter creates a distinction when the last letter is simply written as such, Ὦ. If the Greek alphabet was in view, one expects both letters to be handled equally, either Ἄλφα and Ὦμέγα or Ἄ and Ὦ.

Conclusion
Spelling out the first letter recalls the first letter of the Hebrew and Aramaic alphabet, א. The phrase, τὸ Ἄλφα καὶ τὸ Ὦ, is to signify א to Ὦ. The Word of God written, begins in Hebrew and Aramaic and ends in Greek. This implies the Scriptures in the hands of the seven churches are completed by the book John delivers.