25 But besides this, the poor man cannot possibly be injured, if he knows how to be spiritually wise. Now what I said of pleasure, that it consisted not in a costly provision of meats, but in the disposition of those who eat, this also I say respecting an insult; that the insult is either created or destroyed, not by the intention of those who insult, but by the disposition of those who bear it. For example. Some one has insulted you with much language, fit or unfit to repeat.
If you shall laugh at the insults, if you take not the words to heart, if you show yourself superior to the blow, you are not insulted. And just as if we possessed an adamantine body, we should not be hurt, were we even attacked on all sides by a thousand darts, for darts beget wounds not from the hand of him who hurls them, but from the bodies of those who receive them, so too in this case, insults are constituted real and dishonourable ones, not from the folly of those who offer them, but from the weakness of the insulted.
For if we know how to be truly wise, we are incapable of being insulted, or of suffering any serious evils. Some one it may be has offered you an insult, but you have not felt it? You have not been pained. Then you are not insulted, but hast given rather than received a blow! For when the insulting person perceives that his blow did not reach the soul of those who were reviled, he is himself the more severely fretted; and while those who are reproached remain silent, the insulting blow is turned backwards, and recoils of its own accord upon him who aimed it.
Source: Homilies on the Statues (New Advent)