False facts are highly injurious to the progress of science, for they often endure long; but false views, if supported by some evidence, do little harm, for every one takes a salutary pleasure in proving their falseness.
I have tried lately to read Shakespeare, and found it so intolerably dull that it nauseated me.
I cannot persuade myself that a beneficent and omnipotent God would have designedly created parasitic wasps with the express intention of their feeding within the living bodies of Caterpillars.
I am turned into a sort of machine for observing facts and grinding out conclusions.
How paramount the future is to the present when one is surrounded by children.
At some future period, not very distant as measured by centuries, the civilized races of man will almost certainly exterminate, and replace the savage races throughout the world.
Animals, whom we have made our slaves, we do not like to consider our equal.
An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men.
A scientific man ought to have no wishes, no affections, - a mere heart of stone.
A moral being is one who is capable of reflecting on his past actions and their motives - of approving of some and disapproving of others.
I love fools' experiments. I am always making them.
A man who dares to waste one hour of time has not discovered the value of life.
Man tends to increase at a greater rate than his means of subsistence.
A man's friendships are one of the best measures of his worth.
The mystery of the beginning of all things is insoluble by us; and I for one must be content to remain an agnostic.