A fool uttereth all his mind,.... At once; tells all he knows, all that is in his breast; whatever he thinks, and all that he intends to do; what or whom he loves or hates. Or, "a fool brings out all his wrath"; so the Targum, Septuagint, Syriac, and Arabic versions: he cannot restrain it, nor hide it; it breaks out at once, even all of it, and is soon known, as in Pro 12:16; but a wise man keepeth it in till afterwards; reserves his mind, and thoughts, and designs, to himself; and does not discover them until a proper opportunity offers, when to disclose them is most to advantage; or he restrains his wrath and anger, defers showing it to a proper time, when it may answer a better purpose, and he may do it without sin.