We must all obey the great law of change. It is the most powerful law of nature.

The Fate of good men who refuse to become involved in politics is to be ruled by evil men.

Circumspection and caution are part of wisdom.

Learning will be cast into the mire and trodden down under the hoofs of a swinish multitude.

There is a courageous wisdom; there is also a false, reptile prudence, the result not of caution but of fear.

Where mystery begins religion ends.

A speculative despair is unpardonable where it our duty to act.