The mind is the atmosphere of the soul.

Questions show the mind's range, and answers its subtlety.

We should always keep a corner of our heads open and free, that we may make room for the opinions of our friends. Let us have heart and head hospitality.

The aim of argument, or of discussion, should not be victory, but progress.

Ask the young. They know everything.

There are those to whom one must advise madness.

Forms of government become established of themselves. They shape themselves, they are not created. We may give them strength and consistency, but we cannot call them into being. Let us rest assured that the form of government can never be a matter of choice: it is almost always a matter of necessity.