Noble be man, helpful and good!

Everything factual is, in a sense, theory. The blue of the sky exhibits the basic laws of chromatics. There is no sense in looking for something behind phenomena: they are theory.

One lives but once in the world.

As long as you are not aware of the continual law of Die and Be Again, you are merely a vague guest on a dark Earth.

The man of understanding finds everything laughable.

Passions are vices or virtues to their highest powers.

In the realm of ideas everything depends on enthusiasm... in the real world all rests on perseverance.