Wisdom is sold in the desolate market where none come to purchase. — William Blake

Blake, William. "The Four Zoas: Vala Night the Second." The Complete Poetry and Prose of William Blake. University of California Press, 2008.

Blake, William and Edwin John Ellis and William Butler Yeats. "Vala, or The Four Zoas." The Works of William Blake: Poetic, Symbolic and Critical. London: Bernard Quaritch, 1893, night 2.