We do not act rightly because we have virtue or excellence. But they hesitate, waiting for the other fellow to make the first move-and he, in turn, waits for you.

The line has magnitude in one way, the plane in two ways, and the solid in three ways, and beyond these there is no other magnitude because the three are all.

All art, all education, can be merely a supplement to nature.

To say of what is that it is not, or of what is not that it is, is false, while to say of what is that it is, and of what is not that it is not, is true.

To die, and thus avoid poverty or love, or anything painful, is not the part of a brave man, but rather of a coward; for it is cowardice to avoid trouble, and the suicide does not undergo death because it is honorable, but in order to avoid evil.

In justice is all virtues found in sum.

People of superior refinement and of active disposition identify happiness with honour; for this is roughly speaking, the end of political life.