M. Tullius Cicero, De Officiis
Walter Miller, Ed.

[144] Such orderliness of conduct is, therefore, to be observed, that everything in the conduct of our life shall balance and harmonize, as in a finished speech. ¹ For it is unbecoming and highly censurable, when upon a serious theme, to introduce such jests as are proper at a dinner, or any sort of loose talk. When Pericles was associated with the poet Sophocles as his colleague in command and they had met to confer about official business that concerned them both, a handsome boy chanced to pass and Sophocles said: “Look, Pericles; what a pretty boy!” How pertinent was Pericles's reply: “Hush, Sophocles, a general should keep not only his hands but his eyes under control.” And yet, if Sophocles had made this same remark at a trial of athletes, he would have incurred no just reprimand. So great is the significance of both place and circumstance. For example, if anyone, while on a journey or on a walk, should rehearse to himself a case which he is preparing to conduct in court, or if he should under similar circumstances apply his closest thought to some other subject, he would not be open to censure [p. 149] but if he should do that same thing at a dinner, he would be thought ill-bred, because he ignored the proprieties of the occasion.