A man who dares to waste one hour of time has not discovered the value of life.

Attention, if sudden and close, graduates into surprise; and this into astonishment; and this into stupefied amazement.

And hail their queen, fair regent of the night.

The very essence of instinct is that it's followed independently of reason.

I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.

Man is descended from a hairy, tailed quadruped, probably arboreal in its habits.

The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.

The mystery of the beginning of all things is insoluble by us; and I for one must be content to remain an agnostic.

I am turned into a sort of machine for observing facts and grinding out conclusions.