When a man merely speaks to, or just notices, his dog,we see the last vestige of these movements in a slight wag of the tail, without any other movem… - Charles Darwin

Self-portraits have the merit of disclosing the influences as well as the man. There may be some to whom the Autobiography will prove what Charles Darwin was not—a metaphysician or profound thinker beyond the scope of his world-wide subject. But no one can read his own words and fail to recognise a character of rare simplicity and complete integrity. The Autobiography shows how it was that he altered the whole course of Victorian thought, not by blazoning his discoveries nor by sudden iconoclasm, but rather through searching insight and pondered judgments opening up vast fields for further research.

To admit that species generally become rare before they become extinct — to feel no surprise at the comparative rarity of one species with another, and yet to call in some extraordinary agent and to marvel greatly when a species ceases to exist, appears to me much the same as to admit that sickness in the individual is the prelude to death — to feel no surprise at sickness — but when the sick man dies to wonder, and to believe that he died through violence.

The sight of a feather in a peacock’s tail, whenever I gaze at it, makes me sick!