He who sins is of the devil, for the devil has been sinning from the beginning. To this end the Son of God was revealed, that he might destroy the works of the devil.
Jesus came to undo all the devil has done to the human race. His coming was predicted in the twilight of time when God promised to overthrow the power of Satan through the "seed of the woman," which is Christ (Genesis 3:15). This purpose was fulfilled on Calvary when the devil "bruised the heel" of Christ by a bloody crucifixion while, at the same time, Jesus dealt a crushing blow to "the head of the serpent" and rendered his authority useless against those who would trust in Christ. At the second coming of Christ, all the pain and sorrow that Satan has brought upon mankind will be destroyed, and sin and the curse of sin will no longer haunt us.