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 selection, seems, I freely confess, absurd in the highest degree.

In: Great Books of the Western World (Volume 49), The Origin of Species by Means of Natural Selection, Chapter VI (p. 185)