One must have deeper motives and judge everything accordingly, but go on talking like an ordinary person.

Plurality which is not reduced to unity is confusion; unity which does not depend on plurality is tyranny.

Our true dignity consists — in thought. Thence we must derive our elevation, not from space or duration. Let us endeavor then to think well; this is the principle of morals.

Let each of us examine his thoughts

Must we kill to prevent there being any wicked? This is to make both parties wicked instead of one.

Those who write against vanity want the glory of having written well, and their readers the glory of reading well, and I who write this have the same desire, as perhaps those who read this have also.

By thought I embrace the universe.