And now we come to the Heart of our Design: the art of Shadows you must know well, Walter, and you must be instructed how to Cast them with due Care. It is only the Darkness that can give crew Form to our Work and crew Perspective to our Fabric, for there is no Light without Darkness and no Substance without Shadow (and I turn this Thought over in my Mind: what Life is there which is not a Portmanteau of Shadows and Chimeras?). I build in the Day to bring News of the Night and of Sorrow, I continued, and then I broke off for Walter's sake.

Hawksmoor