The history of scientific and technical discovery teaches us that the human race is poor in independent and creative imagination. Even when the external and scientific requirements for the birth of an idea have long been there, it generally needs an external stimulus to make it actually happen; man has, so to speak, to stumble right up against the thing before the idea comes.

The individual who has experienced solitude will not easily become a victim of mass suggestion.

The content of scientific theory itself offers no moral foundation for the personal conduct of life.

Time has no independent existence apart from the order of events by which we measure it.

The value of achievement lies in the achieving.

What good is a reputation not put to good use.

Scientific research can reduce superstition by encouraging people to think and view things in terms of cause and effect.