Speak for yourself and from yourself, or be silent.

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

In Science the paramount appeal is to the Intellect-its purpose being instruction; in Art, the paramount appeal is to the Emotions-its purpose being pleasure.

In its happiest efforts, translation is but approximation, and its efforts are not often happy. A translation may be good as translation, but it cannot be an adequate reproduction of the original.

Sincerity is moral truth.

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

No man ever made a great discovery without the exercise of the imagination.