Am I mad, to see what others do not see, or are they mad who are responsible for all that I am seeing?

Before we can study the central issues of life today, we must destroy the prejudices and fallacies born of previous centuries.

Woman is more impressionable than man. Therefore in the Golden Age they were better than men. Now they are worse.

Can it be that I have not lived as one ought?" suddenly came into his head. "But how not so, when I've done everything as it should be done?

Much unhappiness has come from things left unsaid

The difference between real material poison and intellectual poison is that most material poison is disgusting to the taste, but intellectual poison, which takes the form of cheap newspapers or bad books, can unfortunately sometimes be attractive.

The most important of all sciences man can and must learn is the science of living so as to do the least evil and the greatest possible good.