"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." - Darwin

 

This is a very cheap and dishonest tactic where a person is quoted out of context, to try and give them impression they are saying something other than the original intent. This is usually the intention, although it could sometimes be the result of extreme laziness and grabbing a bit of a quote and not reading the whole article. 

 

Normally this appears as a single quote, or part of a quote, which is presented on its own without the surrounding paragraph which puts it into context. A popular version of this is trying to make Darwin look like he doesn't believe his own theory, shown at the top. This is the full quote, which explains what he actually meant:

 

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. Yet reason tells me, that if numerous gradations from a perfect and complex eye to one very imperfect and simple, each grade being useful to its possessor, can be shown to exist; if further, the eye does vary ever so slightly, and the variations be inherited, which is certainly the case; and if any variation or modification in the organ be ever useful to an animal under changing conditions of life, then the difficulty of believing that a perfect and complex eye could be formed by natural selection, though insuperable by our imagination, can hardly be considered real.

—Charles Darwin, Origin of Species

 

So always beware of quotes which seem to be evidence of a position you would not expect from someone; ask for the reference and examine the context.