One must not criticize that which is common since it remains always the same.

So much has already been said about Shakespeare that there doesn't seem to be anything more to say; yet it is the quality of the spirit that it forever stimulates the spirit.

If society gives up the right to impose the death penalty, then self-help will appear again and personal vendettas will be around the corner.

Nature reacts not only to physical disease, but also to moral weakness; when the danger increases; she gives us greater courage

Life's objective is life itself.

I have heard myself accused of being an opponent, an enemy of mathematics, which no one can value more highly than I, for it accomplishes the very thing whose achievement has been denied me.

It is not enough to take steps which may someday lead to a goal; each step must be itself a goal and a step likewise.