Ramana Maharshi

 The experience of silence is alone the real and perfect knowledge.

Sages say that the state in which the "I"-thought does not rise even in the least, alone is Self which is silence. That silent Self alone is God; Self alone is the individual soul. Self alone is this ancient world. All other knowledge are only petty and trivial knowledge; the experience of silence alone is the real and perfect knowledge. Know that the many objective differences are not real but are mere superimpositions on Self, which is the form of true knowledge.