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.
How paramount the future is to the present when one is surrounded by children.
An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men.
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.
A man's friendships are one of the best measures of his worth.
On the ordinary view of each species having been independently created, we gain no scientific explanation.
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.
Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.
The very essence of instinct is that it's followed independently of reason.
I love fools' experiments. I am always making them.
I have tried lately to read Shakespeare and found it so intolerably dull that it nauseated me.
As for a future life every man must judge for himself between conflicting vague possibilities.
The mystery of the beginning of all things is insoluble by us and I for one must be content to remain agnostic.
As for future life every man must judge for himself between conflicting vague probabilities.
A man who dares to waste one hour of life has not discovered the value of life.