The idea of buddha mind is not purely a concept or a theoretical, metaphysical idea. It is something extremely real that we can experience ourselves. In fact, it is the ego that feels that we have an ego. It is ego that tells us, “My ego is bothering me. I feel very self-conscious about having to be me. I feel that I have a tremendous burden in me, and I wonder what the best way to get rid of it is.” Yet all those expressions of restlessness that keep coming out of us are the expression of buddha nature: the expression of our unborn, unobstructed, and nondwelling nature.
From Ocean of Dharma: The Everyday Wisdom of Chögyam Trungpa, Number 141.