When a man is sufficiently motivated, discipline will take care of itself.

A theory is the more impressive the greater is the simplicity of its premises, the more different are the kinds of things it relates and the more extended the range of its applicability.

Dr. Einstein: Yes; But this year the answers are different.

If I had 20 days to solve a problem, I would take 19 days to define it

In their struggle for the ethical good, teachers of religion must have the stature to give up the doctrine of a personal god.

Gravitation cannot be held responsible for people falling in love. How on earth can you explain in terms of chemistry and physics so important a biological phenomenon as first love? Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.

Selection [of UN delegates] by governments cannot give the peoples of the world the feeling of being fairly and proportionately represented. The moral authority of the UN would be considerable enhanced if the delegates were elected directly by the people. Were they responsible to an electorate, they would have much more freedom to follow their consciences.