A man's worst difficulties begin when he is able to do as he likes.

The foundation of all morality is to have done, once and for all, with lying; to give up pretending to believe that for which there is no evidence, and repeating unintelligible propositions about things beyond the possibilities of knowledge.

Proclaim human equality as loudly as you like, Witless will serve his brother.

The child who has been taught to make an accurate elevation, plan, and section of a pint pot has had an admirable training in accuracy of eye and hand.

There is no sadder sight in the world than to see a beautiful theory killed by a brutal fact.

Deduction, which takes us from the general proposition to facts again-teaches us, if I may so say, to anticipate from the ticket what is inside the bundle.

What men of science want is only a fair day's wages for more than a fair day's work.