Silence is a source of great strength. : Lao Tzu 

Never be bullied into silence.  Never allow yourself to be made a victim. Accept no one’s definition of your life; define yourself.; Harvey Fierstein

After silence, that which comes nearest to expressing the inexpressible is music.; Aldous Huxley

                    All other knowledge are only petty and trivial knowledge; the experience of silence alone is the real and perfect knowledge. – Ramana Maharshi