Mathematics should be mixed not only with physics but with ethics.

Let us not underrate the value of a fact; it will one day flower into a truth.

The slight reproach to which the virtue of patriotism is commonly liable, the noble are most likely to incur.

Still we live meanly like ants, though the fable tells us we were long ago changed into men.

Thaw with her gentle persuasion is more powerful than Thor with his hammer. The one melts, the other breaks into pieces.

The life without men praise and regard as successful is but one kind. Why should we exaggerate any one kind at the expense of the others?

We are ashamed of our fear; for we know that a righteous man would not suspect danger nor incur any. Wherever a man feels fear, there is an avenger.