When reflecting upon transcendental intelligence, you should also consider carefully the various kinds of teacher. There are priests who perform rituals and ceremonies, and deliver eloquent sermons. There are philosophers who assume the reality of the world. And then there are enlightened people. They teach that there is nothing beyond the mind itself; there is no difference between being and non-being; and there is no external world as the object of perception. They teach the solitude of reality.
Lankavatara Sutra: 6