1 John 1:9 - What is the significance of the usage ὁμολογέω (confess) in the context?
A. μετανοέω/μετάνοια in the Synoptic Gospels
μετανοέω/μετάνοια is a major theme and commandment of the Gospel call, which is ubiquitous in the Synoptic gospels and Acts. In most English Versions, μετανοέω/μετάνοια translated as "repent/repentance" -basically means, "to be sorry again." But the primary lexical idea of the words is to change and turn (around) of whole life, as the Hebrew equivalent in LXX, shuv - to return.
"Repentance" is not "confession." And the famous evangelistic phrase, "Repent of your sin," is NOT a Biblical term, but "Repent for the forgiveness of sin, and the salvation" is a solid Biblical term (Mk 1:4; Lk 3:3; 24:47; Ac 2:38).
In the Scripture, μετανοέω never used to mean merely feeling remorse or regret and do penance for wrongdoings. Instead, μετανοέω used in the sense of turning our life directed toward God resulting from a change of mind/ heart; from the old self-centered life to the God-centered new life in Christ; and for Jews, from the work of the Laws to believing in Jesus, the Gospel.
Jesus in Mark 1: 15 (and John the Baptist, Mt 3:2) speaks to Jews to μετανοεῖτε -Turn ye, not Repent ye (=be sorry). For, in the message, Jesus declares the new Messianic era has come, and now Jews must turn (μετανοέω ) to believe in the Gospel, from the belief in the works of the Laws. Nowhere in the Scripture, turning to believe in the Gospel is a sin that needs repentance /contrition (be sorry). Therefore, the proper translation of μετανοεῖτε is Turn ye, not, Repent ye (=Be sorry ye).
[A note: Interestingly, CEV, GNT, and God's Word Translation have rendered μετανοέω as - Turn back to God; Turn away from your sin, and Change the way you think and act; LSV-convert and believe; Amplified -repent [change your inner self-your old way of thinking, etc.]
Bible is clear, without turning to God, feeling and being sorry for wrongdoings will not get us the forgiveness of sins, much less salvation. Turning to Jesus and believing the Gospel is the only way for eternal life in the kingdom of heaven. It is the prerequisite for salvation, as seen in the thief saved on the cross and the prodigal son (Lk 23:43; 15:11-32). As the evangelical buzzword - "Turn or burn," we need to turn to Jesus for receiving the forgiveness of sin, salvation, and the restoration of the severed relationship.
The Gospel call to turn (μετανοέω) and believe in the Gospel is for all living souls whose hearts/minds are far away from YHWH (Isaiah 29:13; Matt 15:8) -the Jews, gentiles, the unbelieving believers, the backsliders, including the apostates (Jer 3:22).
It is always a good time for μετανοέω/μετάνοια (to turn/turning). It is never too late, as in the case of the thief on the cross and the prodigal son. The loving Father is calling all to μετανοέω/μετάνοια, as the old hymn goes: Softly and Tenderly Jesus is Calling, 1 & 4 stanzas (W.L. Thompson, 1800):
"Softly and tenderly Jesus is calling;
Calling for you and for me.
See on the portal, He's watching and waiting;
Waitin' for you and for me.
O for the wonderful love He has promised,
promised for you and for me!
Though we have sinned, He has mercy and pardon,
pardon for you and for me.
Ref: Come home, come home; you who are weary,
come home; Earnestly, tenderly,
Jesus is calling, calling, O sinner,
come home.
B. ὁμολογέω - to confess in 1 John 1:9
For a true Christian, to live with unconfessed sins is like walking in shoes with grains of sands or living with artery-clogging in progress. If we ignore or procrastinate about our sins in time, it will wear us out or be deadly, spiritually speaking, sooner or later. Besides, we will forfeit of ourselves of many of God's blessings and favors, and He will not hear us (Is 59:2; Ps 55:18). As Jesus taught us to pray, "forgive us our sins," confession of sin has vital importance for a healthy and intimate relationship between Abba Father God and His children.
John speaks to Believers who have fellowship with Jesus and walk in the light (v.6-7). Some claimed that walking in darkness and having fellowship is compatible (v.6), while others claim "no sin" (v. 8). To them, John calls it is a lie and self-deceived by saying, "We deceive ourselves and the truth is not in us" (v. 8). And, to them, John speaks, if you are truly walking in the light and having the truth in you, you need to keep on confessing of sins, so that God could forgive your sins and cleanse you of all unrighteousness.
(The semantic ranges of the ὁμολογέω: confess, acknowledge, admit, recognize, and agree, etc., meaning: to say the same conclusion in complete agreement with the Word of God.)
Confession of Sin means a genuine expression of our recognition within and our admitting to God - "I sinned against God, as the Word of God says and means. It includes the sins of omission and commission in our thoughts, attitudes, words, or actions without reservations, excuses, or justifications. Also, confession of sins needs to be specific to each offense as the "sins" in plural implies, not in a lump sum, like, "I confess all my sins," etc.
The initial remission of our sins lifts the guilts away, frees us from the bondage of sin, and gives us a fresh start. The war against the power of sin is over, but the battle against sin of evil desires in us is with us (Rom Ch. 7). In the Scripture, God wants His people holy as He is. We can only strive to that end in this life. Our part is to confess our sins, whenever and wherever, as the Word and the Holy Spirit convicts us. God promises He will cleanse us from all unrighteousness and remember our sins no more v. 9; Heb 8:12). Confession of sin is God's loving provision to facilitate keeping us clean.
Conclusion:
In the Synoptic Gospels, Jesus and John the Baptist began their ministries by declaring, "Repent ye, for the kingdom of heaven is at hand." Repentance means turning/returning to God, a prerequisite for salvation, and to repent is our taking the vital steps unto justification and reconciliation with the loving God.
Concerning the confession of sins, it must not only be on our memory verse list but the "must-do" list and put into practice as well if we genuinely seek daily walks in the light in an intimate fellowship with God, the Father. In the life of King David- the man after God's heart, we can look and learn the aspect of the life of confession of sin as in 2 Samuel 12:13 and in Psalm 51, He cries out to God:
Create in me a clean heart, O God.
And renew a right spirit within me.
Cast me not away from Thy presence, O Lord.
And, take not Thy Holy Spirit from me.
Restore unto me, the joy of Thy salvation.
And renew a right spirit within me.
(from the song by Kieth Green)
For his heartless confession, King Saul lost his eternal kingdom dynasty (1 Sam. 13:13), being possed by an evil spirit, lost his mind, and died a shameful death. Unlike Peter, Judas, Iscariot changed his mind feeling sorry but never turned to Jesus. Instead, he brought the eternal damnation upon himself. Peter turned and stayed with Jesus, confessed his sin, Jesus restored him, Peter died the glorious martyr's death.