In all sincere speech there is power, not necessarily great power, but as much as the speaker is capable of.

Sincerity is moral truth.

Mathematicians do not write for the circulating library.

If you feel yourself to be above the mass, speak so as to raise the mass to the height of your argument.

As all Art depends on Vision, so the different kinds of Art depend on the different ways in which minds look at things.

The discoverer and the poet are inventors; and they are so because their mental vision detects the unapparent, unsuspected facts, almost as vividly as ocular vision rests on the apparent and familiar.

Genius is rarely able to give any account of its own processes.