1 Peter 1:23
23 Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.
What is the corruptible seed?
Sin (the power source behind the things we do that we do not want to do—things that always leave us with regrets). Romans 7:19-20
19 For the good that I would I do not: but the evil which I would not, that I do. 20 Now if I do that I would not, it is no more I that do it, but sin that dwelleth in me. (Romans 7:19-20)
What or who is the incorruptible seed?
The word of God; Jesus; The son of God, life (everlasting life).
He (the word of God) came (down as flesh—John 1:14 ) to save us (the people of this world) from the grip or power, sin has over us. He (the word of God) came down to give us a choice. A choice to be born again with a different seed—the word of God (1 Peter 1:23). This is what it means to accept Christ and to have Him(the word of God) dwell in us. With this new seed, we cannot sin against God or man according to 1 John 3:9
9 Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God. (1 John 3:9)
Sin only begins or we can only sin after we are born again when we disobey God by walking according to our flesh, or when the devil deceives us again like He deceived Adam and Eve to sin against God.