Charles Darwin

On your life, underestimating the proclivities of finches is likely to lead to great internal hemorrhaging.

Charles Darwin

One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.

Charles Darwin

One hand has surely worked throughout the universe.

Charles Darwin

Origin of man now proved. Metaphysics must flourish. He who understand baboon would do more towards metaphysics than Locke.

Charles Darwin

Our ancestor was an animal which breathed water, had a swim-bladder, a great swimming tail, an imperfect skull & undoubtedly was an hermaphrodite! Here is a pleasant genealogy for mankind.

Charles Darwin

Our faculties are more fitted to recognize the wonderful structure of a beetle than a Universe.

Charles Darwin

Physiological experiment on animals is justifiable for real investigation, but not for mere damnable and detestable curiosity.

Charles Darwin

Progress has been much more general than retrogression.

Charles Darwin

Seeing this gradation and diversity of structure in one small, intimately related group of birds, one might really fancy that from an original paucity of birds in this archipelago, one species had been taken and modified for different ends.

Charles Darwin

Sexual selection acts in a less rigorous manner than natural selection. The latter produces its effects by the life or death at all ages of the more or less successful individuals.

Charles Darwin