For perfect effectiveness the Atonement belongs at the center of the inner altar, where it undoes the separation and restores the wholeness of the mind. Before the separation the mind was invulnerable to fear, because fear did not exist. Both the separation and the fear are miscreations that must be undone for the restoration of the temple, and for the opening of the altar to receive the Atonement. This heals the separation by placing within you the one effective defense against all separation thoughts and making you perfectly invulnerable.
