The serpent seed is the spirit of disobedience against the Will of the Father using the human will. Satan, in Revelations 12:7-12 would like to replace God. He made war in Heaven. He would like to sit on the Throne and put God out and His Words aside. But he did not succeed.
He, Satan, came down and he used Adam and Eve to replace God because he could not use himself anymore. He deceived Adam and Eve by saying, “You can become gods like Him. You do not have to believe Him. You will not surely die but you will become gods like Him, knowing good and evil.”(Genesis 3:1-5).
When Adam and Eve believed Satan, they replaced God and they became the god. What are they doing now? They are now following their own will, disregarding the will of the Almighty Father, being gods to themselves.
Your own will became the god in you that you follow. It is no longer the Will of the Father that you follow. It is your own will now. You know what is right and you know what is wrong, according to you, not according to God.
You replaced God now. You became a god to yourself.
To repent is to surrender your human will, who is the god in you. When you surrender your human will, you let Him be the God again. That means to focus on His Will again and subject yourself to that Will and obey that Will, lovingly, loyally and obediently, no matter what. That is salvation.