“A master may show the disciple a mirror and explain how the mirror itself does not judge the reflections arising in it to be either beautiful or ugly: the mirror is not changed by whatever kind of reflection may arise, nor is its capacity to reflect impaired. It is then explained that the void nature of the mind is like the nature of the mirror, pure, clear, and limpid, and that no matter what arises, the void essence of the mind can never be lost, damaged, or tarnished.”
CHÖGYAL NAMKHAI NORBU RINPOCHE
The Crystal And The Way Of Light: Sutra, Tantra And Dzogchen