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

“How do we distinguish the owl from the beast, the horse from the ox, but by the bounding outline? How do we distinguish one face or countenance from another but by the bounding-line and its infinite inflections and movements? What is it that builds a house and plants a garden but the definite and determinate? What is it that distinguished honesty from knavery but the hard and wiry line of rectitude and certainty in the actions and intentions?” [via]