It is a sad thing when men have neither enough intelligence to speak well, nor enough sense to hold their tongues; this is the root of all impertinence.

It is a sad thing when men have neither the wit to speak well, nor the judgment to hold their tongues. | As quoted in A Dictionary of Thoughts: being A Cyclopedia of Laconic Quotations from the Best Authors of the World, both Ancient and Modern (1908) edited by Tryon Edwards, p. 560