You can use one idea to cancel another. You can balance a negative emotion by instilling a positive one. Giving is the opposite of greed. Benevolence is the opposite of hatred. Understand clearly now: this is not an attempt to liberate yourself by autohypnosis. You cannot condition enlightenment. Nibbana is an unconditioned state. A liberated person will indeed be generous and benevolent, but not because she has been conditioned to be so. She will be so purely as a manifestation of her own basic nature, which is no longer inhibited by ego.