He is master of the Dhyanas and enters into the Samadhis, but to reach the higher stages one must pass beyond the Dhyanas, the immeasurables, the world of no-forrn, and the bliss of the Samadhis into the Samapattis leading to the cessation of thought itself. The dhyana-practiser, dhyana, the subject of dhyana, the cessation of thought, once-returning, never-returning, all these are divided and bewildering states of mind. Not until all discrimination is abandoned is there perfect emancipation.

(The Lankavatara Sutra)