I think we have to safeguard ourselves against people who are a menace to others, quite apart from what may have motivated their deeds.

The theory must not contradict empirical facts.

There are six-million shots in the game of pool.

A happy man is too satisfied with the present to dwell too much on the future.

Desire for approval and recognition is a healthy motive, but the desire to be acknowledged as better, stronger, or more intelligent than a fellow being or fellow scholar easily leads to an excessively egoistic psychological adjustment, which may become injurious for the individual and for the community.

But could not our situation be compared to one of a menacing epidemic? People are unable to view this situation in its true light, for their eyes are blinded by passion. General fear and anxiety create hatred and aggressiveness. The adaptation to warlike aims and activities has corrupted the mentality of man; as a result, intelligent, objective and humane thinking has hardly any effect and is even suspected and persecuted as unpatriotic.

Education is what is left after you've forgotten everything you've learned.