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Speech was given to man to disguise his thoughts.

Speech is one of the marvels that characterize man, and also one of the most difficult spontaneous creations that have been accomplished by nature.

The same words conceal and declare the thoughts of men.

Look wise, say nothing, and grunt. Speech was given to conceal thought.

Men use thought only as authority for their injustice, and employ speech only to conceal their thoughts.

Whoever thinks that he alone has speech, or possesses speech or mind above others, when unfolded such men are seen to be empty.

Wise men speak because they have something to say; Fools because they have to say something.

Wise men, when in doubt whether to speak or to keep quiet, give themselves the benefit of the doubt, and remain silent.

Converse with men makes sharp the glittering wit, but God to man doth speak in solitude.