Sokuzan quotes this sentence from the introduction in Cutting Through Spiritual Materialism by Chogyam Trungpa to go deeper into the idea of liberated concepts: "The process of transforming the material of mind from expressions of ego's ambition into expressions of basic sanity and enlightenment through the practice of meditation---this might be said to be the true spiritual path."

https://www.youtube.com/watch?v=UQOCfiR7PE0