The mind is a veil woven of thoughts. It has no substance by itself. If we pull the thoughts out one after the other, when they have all been removed, there is no mind left.

From Sri Swami Satchidananda, The Yoga Sutras of Patanjali, Commentary to Book II, Sutra 52, Buckingham, Virginia: Integral Yoga Publications, 2007 (first published in 1978), p. 164.