«He who sins is of the devil, for the devil has sinned from the beginning. For this purpose the Son of God was manifested, that He might destroy the works of the devil» (1 John, 3:8).
The devil deceived Adam and Eve who were reflecting the glory of God in the earth, because he hated God and all the things that brought glory to God. Adam and Eve were given a free will and a right to choose and they decided to disobey God and submit to the voice of the devil. That is how sin entered their life and the life of all of the generations after them. They gave themselves and their posterity into the hands of death. And since that time death has begun its reign over people.