The key point of the mahayana approach is the commitment to dedicate yourself to helping other sentient beings. Building yourself up or perpetuating your own existence is regarded as neurosis. Instead of building yourself up, you should continue with your pursuit of helping others. Instead of being selfish, you should empty yourself. The basic definition of ego is holding on to one’s existence—and paramita practices are techniques that allow you not to grasp onto or propagate the notion of me-ness, or “I am.” Experiencing egolessness is a process of letting go. But you do not regard the ego as an enemy or obstacle, you regard it as a brussels sprout that you cook and eat.
From The Profound Treasury of the Ocean of Dharma. Volume Two: The Bodhisattva Path of Wisdom and Compassion by Chögyam Trungpa, pages 196–197