A good mind is a lord of a kingdom.

That which takes effect by chance is not an art.

Let us ask what is best - not what is customary. Let us love temperance - let us be just - let us refrain from bloodshed.

This is the difference between us Romans and the Etruscans: We believe that lightning is caused by clouds colliding, whereas they believe that clouds collide in order to create lightning. Since they attribute everything to gods, they are led to believe not that events have a meaning because they have happened, but that they happen in order to express a meaning.

Philosophy alone makes the mind invincible, and places us out of the reach of fortune, so that all her arrows fall short of us.

The mind is a matter over every kind of fortune; itself acts in both ways, being the cause of its own happiness and misery.

People do not die - they kill themselves.