Knowledge shrinks as wisdom grows.

Learning is often spoken of as if we are watching the open pages of all the books which we have ever read, and then, when occasion arises, we select the right page to read aloud to the universe.

To see what is general in what is particular, and what is permanent in what is transitory, is the aim of scientific thought.

It is more important that a proposition be interesting than that it be true. This statement is almost a tautology. For the energy of operation of a proposition in an occasion of experience is its interest and is its importance. But of course a true proposition is more apt to be interesting than a false one.

Every epoch has its character determined by the way its population reacts to the material events which they encounter.

To come very near to a true theory, and to grasp its precise application, are two different things, as the history of science teaches us. Everything of importance has been said before by someone who did not discover it.

Everything of importance has been said before by somebody who did not discover it.