In the sitting practice of meditation, each time pain comes up, you feel that you are overcoming the possessiveness of ego by feeling that particular pain. But in actual fact, your ego may be strengthened, because you feel that you worked so hard and you faced so much. You have been doublecrossed by ego.
Excerpted from:
Glimpses of Abhidharma
by Chรถgyam Trungpa Rinpoche,
page 26