No reception without reaction, no impression without correlative expression, -this is the great maxim which the teacher ought never to forget.

Science, like life, feeds on its own decay. New facts burst old rules; then newly divined conceptions bind old and new together into a reconciling law.

First... a new theory is attacked as absurd; then it is admitted to be true, but obvious and insignificant; finally it is seen to be so important that its adversaries claim that they themselves discovered it.

Any object not interesting in itself may become interesting through becoming associated with an object in which an interest already exists. The two associated objects grow, as it were, together; the interesting portion sheds its quality over the whole; and thus things not interesting in their own right borrow an interest which becomes as real and as strong as that of any natively interesting thing.

There is nothing so absurd that it cannot be believed as truth if repeated often enough.

The emotions aren't always immediately subject to reason, but they are always immediately subject to action.

Once you accept an idea, it's an idea whose time has come.