God spoke in the Garden of Eden that the seed of woman would crush the head or the authority of the devil. Many years later, as promised, Jesus was born of a virgin; Son of God, son of man. God became a human being so He could rescue or save us from our sins. The seed of promise was Christ, and when we believe and are baptized, we enter into Christ, or into the seed of promise. All believers have the incorruptible seed living in their heart and they live in Him, or In Christ. Christ in us and us in Christ all because of what Jesus did for us.