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

[46] Well then, when we are weighing what seems to¹ be expedient in friendship against what is morally right, let apparent expediency be disregarded and [p. 315] moral rectitude prevail; and when in friendship requests are submitted that are not morally right, let conscience and scrupulous regard for the right take precedence of the obligations of friendship. In this way we shall arrive at a proper choice between conflicting duties—the subject of this part of our investigation.

11. Through a specious appearance of expediency² wrong is very often committed in transactions between state and state, as by our own country in the destruction of Corinth. A more cruel wrong was perpetrated by the Athenians in decreeing that the Aeginetans, whose strength lay in their navy, should have their thumbs cut off. This seemed to be expedient; for Aegina was too grave a menace, as it was close to the Piraeus. But no cruelty can be expedient; for cruelty is most abhorrent to human nature, whose lead we ought to follow.