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.

Do not teach too many subjects and what you teach, teach thoroughly.

From the moment of birth we are immersed in action, and can only fitfully guide it by taking thought.

There is no greater hindrance to the progress of thought than an attitude of irritated party-spirit.

It takes an extraordinary intelligence to contemplate the obvious.

How the past perishes is how the future becomes.

Rightness of limitation is essential for growth of reality.