The soul, like the body, accepts by practice whatever habit one wishes it to contact.

My advice to you is get married: if you find a good wife you’ll be happy; if not, you’ll become a philosopher.

Be kind, for everyone you meet is fighting a hard battle.

Mankind is made of two kinds of people: wise people who know they're fools, and fools who think they are wise.

Envy is the ulcer of the soul

Do not trouble about those who practice philosophy, whether they are good or bad; but examine the thing itself well and carefully. And if philosophy appears a bad thing to you, turn every man from it, not only your sons; but if it appears to you such as I think it to be, take courage, pursue it, and practice it, as the saying is, 'both you and your house.