Society itself is an accident to the spirit, and if society in any of its forms is to be justified morally it must be justified at the bar of the individual conscience.

Nietzsche said that the earth has been a madhouse long enough. Without contradicting him we might perhaps soften the expression, and say that philosophy has been long enough an asylum for enthusiasts.

There is a kind of courtesy in skepticism. It would be an offense against polite conventions to press our doubts too far.

The irrational in the human has something about it altogether repulsive and terrible, as we see in the maniac, the miser, the drunkard or the ape.

Imagination is potentially infinite. Though actually we are limited to the types of experience for which we possess organs, those organs are somewhat plastic. Opportunity will change their scope and even their center.

The true Christian is in all countries a pilgrim and a stranger.

The line between what is known scientifically and what has to be assumed in order to support knowledge is impossible to draw. Memory itself is an internal rumour.