" His last night, the sky was cloudless with a full moon lighting the snowy terrain in an opalescent blue light. He remembered Yasmin telling him that the moonlight that reaches Earth is mainly the reflected light from the sun with some starlight and Earthlight thrown in. She'd told him that the light wasn't really blue, it was because of the Purkinje effect, a flaw in the human eye, that made it so. And he'd thought that what we know is filtered by our flaws, and sometimes turned more beautiful by them. "

― Rosamund Lupton , The Quality of Silence