Ideas are forces; our acceptance of one determines our reception of others.

A man may be variously accomplished, and yet be a feeble poet.

When a man fails to see the truth of certain generally accepted views, there is no law compelling him to provoke animosity by announcing his dissent.

The great desire of this age is for a doctrine which may serve to condense our knowledge, guide our researches, and shape our lives, so that conduct may really be the consequence of belief

The true function of philosophy is to educate us in the principles of reasoning and not to put an end to further reasoning by the introduction of fixed conclusions.

Science is not addressed to poets.

Originality is independence, not rebellion; it is sincerity, not antagonism.