It is so human a book that I don't see how belief in its divine authority can survive the reading of it.

When once a decision is reached and execution is the order of the day, dismiss absolutely all responsibility and care about the outcome.

The world is all the richer for having a devil in it, so long as we keep our foot upon his neck.

The prescription is that the subject must be made to show new aspects of itself; to prompt new questions; in a word, to change. From an unchanging subject the attention inevitably wanders away.

Truth is something that happens to an idea.

The strenuous life tastes better

Owing to the fact that all experience is a process, no point of view can ever be the last one