Ideas are the roots of creation.

Too often we forget that genius, too, depends upon the data within its reach, that even Archimedes could not have devised Edison's inventions.

Every now and then we discover in the seething mass of humanity round us a person who does not seem to need anybody else, and the contrast with ourselves is stinging.

Ideas are the roots of creation.

Learn to attack things frontally but according to the most scientific methods.

The history of the past interests us only in so far as it illuminates the history of the present.

A book, like a landscape, is a state of consciousness varying with readers.