John and other biblical authors emphasize that Jesus Christ came in the flesh as a human being. This is important because Jesus had to be fully human to die for human sins. Jesus was conceived by the Holy Spirit and born of the virgin Mary. He was fully human, while also being fully God. As a human, Jesus had blood, a physical body, and was able to die. As God, He remained sinless and His sacrifice was sufficient to cover all human sin. Jesus' humanity is proven by the fact that He was seen, heard, and touched by witnesses like John. After His death, He was resurrected and received back the glory He had laid aside. Believing that Jesus came in the flesh is a sign of having the Spirit of God. Denying His humanity is associated with the spirit of antichrist. By becoming human while remaining fully God, Jesus was uniquely qualified to serve as the perfect sacrifice for sins. His death and resurrection provide reconciliation with God and salvation for those who believe.