Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.

The whole of science is nothing more than a refinement of everyday thinking.

The man of science is a poor philosopher.

It stands to the everlasting credit of science that by acting on the human mind it has overcome man's insecurity before himself and before nature.

All that is valuable in human society depends upon the opportunity for development accorded the individual.