The summation of human experience is being expanded at a prodigious rate, and the means we use for threading through the consequent maze to the momentarily important item is the same as was used in the days of square-rigged ships.

If scientific reasoning were limited to the logical processes of arithmetic, we should not get very far in our understanding of the physical world

A belief may be larger than a fact.

Science can give mankind a better standard of living, better health and a better mental life, if mankind in turn gives science the sympathy and support so essential to its progress.

A belief may be larger than a fact. A faith that is overdefined is the very faith most likely to prove inadequate to the great moments of life.

The common idea that scientists reject a theory as soon as it leads to a contradiction is just not so. When they get something that works at all they plunge ahead with it and ignore its weak spots... scientists are just as bad as the rest of the public in following fads and being influenced by mass enthusiasm.

Basic scientific research is scientific capital.