The destiny of the human race is to widen the gap separating it from the lower races of animals. Any code of morality which retains its permanence and authority after the conditions of existence which gave rise to it have changed, works against this upward progress of man.

Everywhere resoundeth the voices of those who preach death; and the earth is full of those to whom death hath to be preached.

A matter that becomes clear ceases to concern us.

On every parable you ride to every truth.

It takes physical courage to indulge in wickedness. The "good" are too cowardly to do it.

Talking much about oneself can also be a means to conceal oneself.

There was at all events one advantage in the choice of this day to my birth; my birthday throughout the whole of my childhood was a day of public rejoicing.