In the very books in which philosophers bid us scorn fame, they inscribe their names.

The existence of virtue depends entirely upon its use.

To study philosophy is nothing but to prepare one’s self to die.

Non nobis solum nati sumus. (Not for ourselves alone are we born.)

I cannot find a faithful message-bearer," he wrote to his friend, the scholar Atticus. "How few are they who are able to carry a rather weighty letter without lightening it by reading.

Leisure consists in all those virtuous activities by which a man grows morally, intellectually, and spiritually. It is that which makes a life worth living.

No one has leave to sin.