A man who dares to waste one hour of time has not discovered the value of life.
From Charles Darwin
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.
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.
I love fools' experiments. I am always making them.
The very essence of instinct is that it's followed independently of reason.
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.
Man is descended from a hairy, tailed quadruped, probably arboreal in its habits.
On the ordinary view of each species having been independently created, we gain no scientific explanation.
To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact.
I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.
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