The philosopher Epicurus said, “the misfortune of the wise is better than the prosperity of the fool.” Diogenes. Diogenes Laertius,...

Dinocrates was an ambassador sent by his city to Rome to beg for help as there city was under siege and could not last much longer:

Even the date seemed right. An assassination on April 13 would reemphasize how fate had driven Booth, and how history had guided him. Not only was it the birthday of Jefferson, but in the ancient Roman calendar it was a day of reckoning‑‑the Ides. The symbolism was not lost on Booth. But in case anyone else should miss the point, he would script his own act in conscious imitation of the killing of Caesar. He would strike down the president in public, preferably in a theater.

"He is no fool who gives what he cannot keep to gain that which he can never lose." Jim Elliot

Here is a man who does not listen to reason, he does not understand when he is confuted; he is (a donkey).

Appian reminds Carthage of how the sea caused them to fall:

“A fool you can neither persuade nor break.” God forbid that I should ever have for a friend a wise fool! There is nothing harder to handle. “I have decided,” he says! Why yes, and so have madmen; but the more firm their decision is about what is false, the more hellebore58 they need.

If a man, says Epictetus, resists truths that are all too evident, in opposing him it is not easy to find an argument by which one may cause him to change his opinion. The reason for this is neither the man’s ability nor the teacher’s weakness; nay, when a man who has been trapped in an argument hardens to stone, how shall one any longer deal with him by argument?