One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.
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.
How paramount the future is to the present when one is surrounded by children.
I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.
The very essence of instinct is that it's followed independently of reason.