The progress of Science consists in observing interconnections and in showing with a patient ingenuity that the events of this ever-shifting world are but examples of a few general relations, called laws. To see what is general in what is particular, and what is permanent in what is transitory, is the aim of scientific thought.

The whole of mathematics consists in the organization of a series of aids to the imagination in the process of reasoning.

What we perceive as the present is the vivid fringe of memory tinged with anticipation.

The tragedy of the world is that those who are imaginative have but slight experience, and those who are experienced have feeble imaginations.

Speech is human nature itself, with none of the artificiality of written language.

Value is coextensive with reality.

One main factor in the upward trend of animal life has been the power of wandering.