Every time you are present when the pain-body arises, some of the pain-body's negative emotional energy will burn up, as it were, and become transmuted into Presence. The rest of the pain-body will quickly withdraw and wait for a better opportunity to arise again, that is to say, when you are less conscious. A better opportunity for the pain-body to arise may come whenever you lose Presence, perhaps after you have had a few drinks or while watching a violent film. The tiniest negative emotion, such as being irritated or anxious, can also serve as a doorway through which the pain-body can return. The pain-body needs your unconsciousness. It cannot tolerate the light of Presence.

Eckhart Tolle

from A New Earth: Awakening to Your Life's Purpose