" Silence is the Buddha‘s greatest expression. It‘s the Buddha‘s great teaching, what the Hindus call „You are That“ in the Upanishads. „You are the ultimate reality. You are God!“ the Hindus boldly declare. But the Buddha‘s way of affirming that fact is by being silent, because if you are that, after all, if you are what the theists think is God, you already know it yourself. (p. 15) "

― Robert A.F. Thurman , The Jewel Tree of Tibet: The Enlightenment Engine of Tibetan Buddhism