This argument, at all events, has no more weight against Regulus's conduct than it has against the keeping of any other oath. But in taking an oath it is our duty to consider not what one may have to fear in case of violation but wherein its obligation lies: an oath is an assurance backed by religious sanctity; and a solemn promise given, as before God as one's witness, is to be sacredly kept. For the question no longer concerns the wrath of the gods (for there is no such thing) but the obligations of justice and good faith. For, as Ennius says so admirably:
"Gracious Good Faith, on wings upborne; thou oath in Jupiter's great name!"
Whoever, therefore, violates his oath violates Good Faith; and, as we find it stated in Cato's speech, our forefathers chose that she should dwell upon the Capitol "neighbour to Jupiter Supreme and Best."
105 "But," objection was further made, "even if Jupiter had been angry, he could not have inflicted greater injury upon Regulus than Regulus brought upon himself."
What is evil?
Quite true, if there is no evil except pain. But philosophers[CB] of the highest authority assure us that pain is not only not the supreme evil but no evil at all. And pray do not disparage Regulus, as no unimportant witness—nay, I am rather inclined to think he was the very best witness—to the truth of their doctrine. For what more competent witness do we ask for than one of the foremost citizens of Rome, who voluntarily faced torture for the sake of being true to his moral duty?
(2) no evil can be greater than moral wrong;
Again, they say "Of evils choose the least"—that is, shall one "choose moral wrong rather than misfortune," or is there any evil greater than moral wrong? For if physical deformity excites a certain amount of aversion, how offensive ought the deformity and hideousness of a demoralized soul to seem! 106 Therefore, those[CC] who discuss these problems with more rigour make bold to say that moral wrong is the only evil, while those[CD] who treat them with more laxity do not hesitate to call it the supreme evil.
Once more, they quote the sentiment:
"None have I given, none give I ever to the faithless."