Marcus Aurelius: “If a man is mistaken, instruct him kindly and show him his error.”

For he who yields to pain and he who yields to anger, both are wounded and both submit.

With respect to that which happens conformably to nature, we ought to blame neither gods, for they do nothing wrong either voluntarily or involuntarily, nor men, for they do nothing wrong except involuntarily.

Thou must turn to profit the present by the aid of reason and justice.

Throw away thy books; no longer distract thyself: it is not allowed; but as if thou wast now dying, despise the flesh; it is blood and bones and network, a contexture of nerves, veins, and arteries.