The serpent seed is the spirit of disobedience against the Will of the Father using the human will. Satan, in Revelations 12:7-12 wanted to replace God. He rebelled against God and made war in Heaven. He wanted sit on the Throne of God and set His Words aside. But he did not succeed.
So when Satan was thrown down on the earth, he used Adam and Eve to achieve His plan. He deceived Adam and Eve by saying, “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. Since then, every man, woman and child born in the flesh, are 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, but your own will. You know what is right and you know what is wrong according to yourself, not according to God. You replaced God. You became the god to yourself.
To repent is to surrender your human will, which is the god in you. When you surrender your human will, you let the Father be the God again. This means that your focus now is on His Will and you subject yourself to that will and obey that will, lovingly, loyally and obediently, no matter what. That is salvation.