Do you know the source of this quote from a fiction novel ?

Once you know how everything changes with the mutability of the light, there is no special reason to accord primacy to the view in common day.

This sentence comes from a fiction novel I read a number of years ago. Although I copied and saved the sentence I did not record the author or book title. I am hoping that someone can remind me. I sent it to a friend yesterday and would have liked to include the source but of course I could not. Can anyone help?