"One and one make two" assumes that the changes in the shift of circumstance are unimportant. But it is impossible for us to analyze this notion of unimportant change.

It must be admitted that there is a degree of instability which is inconsistent with civilization. But, on the whole, the great ages have been unstable ages.

Seek simplicity, then distrust.

There is no greater hindrance to the progress of thought than an attitude of irritated party-spirit.

Everyone is a philosopher. Not everyone is good at it.

Nobody has a right to speak more clearly than he thinks.

The ideas of Freud were popularized by people who only imperfectly understood them, who were incapable of the great effort required to grasp them in their relationship to larger truths, and who therefore assigned to them a prominence out of all proportion to their true importance.