Speech (n.) is as shallow as time whereas silence is as deep as eternity.
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Speech (n.) is great, but silence is greater.
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Speech (n.) is of time, silence is of eternity.
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Speech (n.) is the art of stifling and suspending thought.
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Speech (n.) is too often not the art of concealing thought (as the Frenchman defined it), but the stifling and suspending of thought so that there is none to conceal.
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Speech (n.) is too often not the art of concealing Thought; but of quite stifling and suspending Thought.