Why, if species have descended from other species by insensibly fine gradations, do we not everywhere see innumerable transitional forms.
The very essence of instinct is that it's followed independently of reason.
An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men.
If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once every week.
Natural selection acts solely by accumulating slight successive favorable variations, it can produce no great or sudden modification; it can act only by very short steps.
The normal food of man is vegetable.
At some future period, not very distant as measured by centuries, the civilised races of man will almost certainly exterminate and replace throughout the world the savage races. At the same time the anthropomorphous apes, as Professor Schaaffhausen has remarked, will no doubt be exterminated. The break will then be rendered wider, for it will intervene between man in a more civilised state as we may hope, than the Caucasian and some ape as low as a baboon, instead of as at present between the negro or Australian and the gorilla.
we are always slow in admitting any great change of which we do not see the intermediate steps
Even people who aren’t geniuses can outthink the rest of mankind if they develop certain thinking habits.
I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.
I am dying by inches, from not having any body to talk to about insects.
Only the fittest will survive.
Man is descended from a hairy, tailed quadruped, probably arboreal in its habits.
To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact.
Much love much trial, but what an utter desert is life without love.
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.
We are optimists, until we are not.
Everything in nature is the result of fixed laws.
It is always advisable to perceive clearly our ignorance.
An agnostic would be the more correct description of my state of mind.
Free will is to mind what chance is to matter.
Our descent, then, is the origin of our evil passions!! The devil under form of Baboon is our grandfather.
The willing horse is always overworked.
Great is the power of steady misrepresentation; but the history of science shows that fortunately this power does not long endure.
In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting themselves best to their environment.
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