Do not speak of your happiness to one less fortunate than yourself. - Plutarch

The two armies separated; and we are told that Pyrrhus said to one who was congratulating him on his victory, “If we are victorious in one more battle with the Romans, we shall be utterly ruined.” 10 For he had lost a great part of the forces with which he came, and all his friends and generals except a few; moreover, he had no others whom he could summon from home, and he saw that his allies in Italy were becoming indifferent, while the army of the Romans, as if from a fountain gushing forth indoors, was easily and speedily filled up again, and they did not lose courage in defeat, nay, their wrath gave them all the more vigour and determination for the war.

Friends and kindred should be the good and virtuous [of all mankind], and that the vicious only should be accounted foreigners. Nor ... Greeks and barbarians should be distinguished by long garments, targets, scimitars, or turbans; but that the Grecians should be known by their virtue and courage, and the barbarians by their vices and their cowardice.

Valour, however unfortunate, commands great respect even from enemies: but the Romans despise cowardice, even though it be prosperous.