“Before a man speaks it is always safe to assume that he is a fool. After he speaks, it is seldom necessary to assume it.”
1940s–present, A Mencken Chrestomathy (1949)
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H.L. Mencken 281
American journalist and writer 1880–1956Related quotes

Source: On the Mystical Body of Christ, p.421

“The superior man acts before he speaks, and afterwards speaks according to his action.”

“Distrust the man who smiles before he speaks.”
Méfie-toi de celui qui rit avant de parler!
Tartarin sur les Alpes (1885; repr. New York: H. Holt, 1917) p. 89; Katharine Prescott Wormeley (trans.) Tartarin of Tarascon. To Which is Added Tartarin on the Alps (Boston: Little, Brown, 1900) p. 241.

André Breton or the Quest of the Beginning
Alternating Current (1967)

Source: Hilkhot De'ot (Laws Concerning Character Traits), Chapter 2, Section 4, p. 32

“Before you speak, it is necessary for you to listen, for God speaks in the silence of the heart. ”

Form in Modern Poetry(1932)