You will be as much value to others as you have been to yourself.

Too much liberty leads both men and nations to slavery.

To be content with what we possess is the greatest and most secure of riches.

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

I am never less alone than when alone.

A letter does not blush.

All I can do is to urge on you to regard friendship as the greatest thing in the world; for there is nothing which so fits in with our nature, or is so exactly what we want in prosperity or adversity.