"To suppose that the eye, with all its inimitable contrivances for adjusting the focus to different distances, for admitting different amounts of light, and for the correction of spherical and chromatic aberration, could have been formed by natural selections, seems, I feely confess, absurd in the highest possible degree."
Charles R. Darwin, the Origin of Species…, fist edition reprint (New York: Avenel Books, 1979), p. 217 – (Chapter 6, Difficulties on Theory”, First Edition: 1859)
"I remember well the time when the thought of the eye made me cold all over, but I have got over this stage of the complaint, and now trifling particulars of structure often make me very uncomfortable. The sight of a feather in a peacock’s tail, whenever I gaze at it, make me sick!"
Charles Darwin in a letter to Asa Gray (April 3, 1860), as cited by Norman Macbeth, “Darwin Retried: An Appeal to Reason (Boston: Gambit, 1971), p. 101.