You can't use an old map to explore a new world.

Scientific research is based on the idea that everything that takes place is determined by laws of Nature, and therefore this holds for the action of people. For this reason, a research scientist will hardly be inclined to believe that events could be influenced by a prayer, i.e. by a wish addressed to a Supernatural Being.

A world government with powers adequate to guarantee security is not a remote ideal for the distant future. It is an urgent necessity if our civilization is to survive.

The question that drives me hazy is whether it is I or others who is crazy.

The formulation of the problem is often more essential than its solution, which may be merely a matter of mathematical or experimental skill.

I am also convinced that one gains the purest joy from spirited things only when they are not tied in with earning one's livelihood.

My scientific work is motivated by an irresistible longing to understand the secrets of nature not by other feelings.