These NOTES ON HEALING come from the Song of Prayer. It is not the "body" that is "sick." The thoughts of unforgiveness made up a body that could be "sick."
The stillness of the Peace of God has a mind that is still. It is not filled with desire and unresolved business. Unforgiveness can bring us back into a body, in the relationships in our world.
We can clear the mind of attack and fear and death. This is the purpose of Healing. The Dawn of immortality is in the Mind of the Son of God which is our Higher Self. The Higher Self can FORGIVE as His main function. This is daily work.