Authentic happiness is always independent of external conditions. Vigilantly practice polite indifference to that which we can't control. Your happiness can only be found within.

Shall I show you the sinews of a philosopher? What sinews are those? - A will undisappointed; evils avoided; powers daily exercised; careful resolutions; unerring decisions.

Liars are the cause of all the sins and crimes in the world.

Were I a nightingale, I would act the part of a nightingale; were I a swan, the part of a swan.

If thy brother wrongs thee, remember not so much his wrong-doing, but more than ever that he is thy brother.

A guide, on finding a man who has lost his way, brings him back to the right path—he does not mock and jeer at him and then take himself off. You also must show the unlearned man the truth, and you will see that he will follow. But so long as you do not show it him, you should not mock, but rather feel your own incapacity.

The soul is unwillingly deprived of truth.