There is no more dangerous error than that of mistaking the consequence for the cause.

The reason adultery is immoral is that it might lead to marriage.

Ye are ugly? Well then, my brethren, take the sublime about you, the mantle of the ugly!

What is the greatest thing ye can experience? It is the hour of great contempt. The hour in which even your happiness becometh loathsome unto you, and so also your reason and virtue.

A refined nature is vexed by knowing that some one owes it thanks, a coarse nature by knowing that it owes thanks to some one.

In almost all sciences the fundamental knowledge is either found in earliest times or is still being sought.

I want to teach men the sense of their existence, which is the Superman, the lightning out of the dark cloud man.