William Blake and his Illustrations to The Divine Comedy in Ideas of Good and Evil by William Butler Yeats.

“To ‘generalize’ forms and shadows, to ‘smooth out’ spaces and lines in obedience to ‘laws of composition,’ and of painting; founded, not upon imagination, which always thirsts for variety and delights in freedom, but upon reasoning from sensation which is always seeking to reduce everything to a lifeless and slavish uniformity” [via]