A Course in Miracles: Manual for Teachers…
“ Not one thought of sin will remain the instant any one of them accepts Atonement for himself. It is not easier to forgive one sin than to forgive all of them. The illusion of orders of difficulty is an obstacle the teacher of God must learn to pass by and leave behind. One sin perfectly forgiven by one teacher of God can make salvation complete. Can you understand this? No; it is meaningless to anyone here. Yet it is the final lesson in which unity is restored. It goes against all the thinking of the world, but so does Heaven. ”
