"Similarly they relate of Diogenes of Sinope, when he began to be a philosopher, that the Athenians were celebrating a festival, and there were public banquets and shows and mutual festivities, and drinking and revelling all night, and he, coiled up in a corner of the market-place intending to sleep, fell into a train of thought likely seriously to turn him from his purpose and shake his resolution, for he reflected that he had adopted without any necessity a toilsome and unusual kind of life, and by his own fault sat there debarred of all the good things. At that moment, however, they say a mouse stole up and began to munch some of the crumbs of his barley-cake, and he plucked up his courage and said to himself, in a railing and chiding fashion, "What say you, Diogenes? Do your leavings give this mouse a sumptuous meal, while you, the gentleman, wail and lament because you are not getting drunk yonder and reclining on soft and luxurious couches?" Whenever such depressions of mind are not frequent, and the mind when they take place quickly recovers from them, after having put them to flight as it were, and when such annoyance and distraction is easily got rid of, then one may consider one's progress in virtue as a certainty."

“We see that kindness or humanity has a larger field than bare justice to exercise itself in; law and justice we cannot, in the nature of things, employ on others than men; but we may extend our goodness and charity even to irrational creatures; and such acts flow from a gentle nature, as water from an abundant spring. It is doubtless the part of a kind-natured man to keep even worn-out horses and dogs, and not only take care of them when they are foals and whelps, but also when they are grown old.”

“Such men ever, whether they have some business to transact, or have taken upon them some office, or are in some critical conjuncture, put before their eyes the example of noble men, and consider what Plato would have done on the occasion, what Epaminondas would have said, how Lycurgus or Agesilaus would have dealt; that so, adjusting and re-modelling themselves, as it were, at their mirrors, they may correct any ignoble expression, and repress any ignoble passion.”

“As Meander says, "For our mind is God;" and as Heraclitus, "Man's genius is a deity.”

“When men are arrived at the goal, they should not turn back.”

“It is a true proverb, that if you live with a lame man, you will learn a limp.”

“You ask of me then for what reason it was that Pythagoras abstained from eating of flesh. I for my part do much admire in what humor, with what soul or reason, the first man with his mouth touched slaughter, and reached to his lips the flesh of a dead animal, and having set before people courses of ghastly corpses and ghosts, could give those parts the names of meat and victuals, that but a little before lowed, cried, moved, and saw; how his sight could endure the blood of slaughtered, flayed, and mangled bodies; how his smell could bear their scent; and how the very nastiness happened not to offend the taste, while it chewed the sores of others, and participated of the saps and juices of deadly wounds.”