What is the Lamb of God? The Lamb of God is the only Son of God, Jesus Christ, who became the perfect sacrifice to die in your place on the cross. He was perfect, spotless, and without blemish in the sight of God and thus was able to take away the sins of the world. Because sin requires a perfect sacrifice, and Jesus was without sin, He became the sacrificial Lamb so you no longer have to live under the control of sin. By His blood, you have been set free.