Sin is just as unreal as sickness, for both are errors—that is, false claims about God's perfect man. An error is always unreal, but to the material senses there may appear to be different degrees of falsity. Spiritual sense alone proves every error to be illusion, neither greater nor lesser—error is all one lie that there is something in opposition to God, Truth.
Mrs. Eddy states in Science and Health, "Sin and sickness are both healed by the same Principle."Science and Health, p. 406; To undertake to demonstrate the nothingness of sickness, wherever it appears, but to avoid handling and mastering the illusions of sin that confront us is to give, in belief, some reality to sin.
Christ Jesus' works included contact with sinners. When the immoral woman came to wash his feet, Jesus did not shun her even though she actually touched him. Simon the Pharisee questioned why the Master permitted this, knowing she was a sinner; but Jesus answered with a parable of two debtors, illustrating that those who are most deeply in debt and are forgiven their sins will love the Christ, Truth, most.See Luke 7: 36-43;