[John 10:27-29 NASB] 27 My sheep listen to My voice, and I know them, and they follow Me; 28 and I give them eternal life, and they will never perish; and no one will snatch them out of My hand. 29 My Father, who has given them to Me, is greater than all; and no one is able to snatch them out of the Father’s hand.
I've heard the argument that "no one" is absolute, meaning there are no exceptions, not even the sheep itself, in support of the doctrine of eternal security. However, I find it challenging to square this view with other passages such as Hebrews 6:4-6 and Hebrews 10:26-31:
[Hebrews 6:4-6 NASB] 4 For it is impossible, in the case of those who have once been enlightened and have tasted of the heavenly gift and have been made partakers of the Holy Spirit, 5 and have tasted the good word of God and the powers of the age to come, 6 and then have fallen away, to restore them again to repentance, since they again crucify to themselves the Son of God and put Him to open shame.
[Hebrews 10:26-31 NASB] 26 For if we go on sinning willfully after receiving the knowledge of the truth, there no longer remains a sacrifice for sins, 27 but a terrifying expectation of judgment and the fury of a fire which will consume the adversaries. 28 Anyone who has ignored the Law of Moses is put to death without mercy on the testimony of two or three witnesses. 29 How much more severe punishment do you think he will deserve who has trampled underfoot the Son of God, and has regarded as unclean the blood of the covenant by which he was sanctified, and has insulted the Spirit of grace? 30 For we know Him who said, “Vengeance is Mine, I will repay.” And again, “The Lord will judge His people.” 31 It is a terrifying thing to fall into the hands of the living God.
Does "no one" include the individual himself?