It is normal to be perfect

Sin is a disease, for it is not essential to mankind, nor an integral part of human nature as God created it. Man was never more fully and truly man than he was before he fell; and he who is specially called 'the Son of Man' knew no sin, neither was guile found in his mouth; yet was he perfectly man. Sin is abnormal; a sort of cancerous growth, which ought not to be within the soul. Sin is disturbing to manhood: sin unmans a man. Sin is sadly destructive to man; it takes the crown from his head, the light from his mind, and the joy from his heart.

('Healing by the Stripes of Jesus' in 12 Sermons of Comfort and Cheer by CH Spurgeon, p4)