Cunning... is but the low mimic of wisdom.

Arguments derived from probabilities are idle.

You are mistaken, my friend, if you think that a man who is worth anything ought to spend his time weighing up the prospects of life and death. He has only one thing to consider in performing any action - that is, whether he is acting rightly or wrongly, like a good man or a bad one.

Each man is capable of doing one thing well. If he attempts several, he will fail to achieve distinction in any.

Whenever a person strives, by the help of dialectic, to start in pursuit of every reality by a simple process of reason, independent of all sensuous information - never flinching, until by an act of the pure intelligence he has grasped the real nature of good - he arrives at the very end of the intellectual world.

Excellent things are rare.

One cannot make a slave of a free person, for a free person is free even in a prison.