John Ruskin,
Modern Painters, Volume 3 (of 5…
“ A white canvas cannot produce an effect of sunshine; the painter must darken it in some places before he can make it look luminous in others; nor can an uninterrupted succession of beauty produce the true effect of beauty; it must be foiled by inferiority before its own power can be developed. Nature has for the most part mingled her inferior and nobler elements as she mingles sunshine with shade, giving due use and influence to both, and the painter who chooses to remove the shadow, perishes in the burning desert he has created. ”
