Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.

For the learning of every virtue there is an appropriate discipline, and for the learning of suspended judgment the best discipline is philosophy.

The power of thought, the vast regions it can master.

It was the duty of wives to submit to husbands, not of husbands to submit to wives. . . men have stronger muscles than women.

Joy of life... depends upon a certain spontaneity in regard to sex. Where sex is repressed, only work remains, and a gospel of work for work's sake never produced any work worth doing.

There is no difference between someone who eats too little and sees Heaven and someone who drinks too much and sees snakes.

In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.