"Christ was our substitute; He kept the whole of the Law perfectly. He is our satisfaction before God (Isaiah 53:6, 2 Cor 5:21) and our substitutionary sacrifice (1 Cor 1:30). This means that Jesus who was perfectly sinless and holy was our substitute before God. He is on our behalf; our very sanctification. It is perfect and unimprovable".
R T Kendall - "Grace" - Charisma House Publications, Florida (2006) - (p26).