Wisdom is not a product of schooling but of the lifelong attempt to acquire it.

It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing...

In the middle of every difficulty lies opportunity.

Today we must abandon competition and secure cooperation. This must be the central fact in all our considerations of international affairs; otherwise we face certain disaster. Past thinking and methods did not prevent world wars. Future thinking must prevent wars...The stakes are immense, the task colossal the time is short. But we may hope- we must hope- that man's own creation, man's own genius, will not destroy him.

Out of the multitude of our sense experiences we take, mentally and arbitrarily, certain repeatedly occurring complexes of sense impression (partly in conjunction with sense impressions which are interpreted as signs for sense experiences of others), and we attribute to them a meaning the meaning of the bodily object.

Subtle is the Lord. Malicious, He is not.

Although I tried to be universal in thought, I am European by instinct and inclination.