The Marriage of Heaven and Hell "A Memorable Fancy" plate 14 (1790 - 1793). Inspired the title of Aldous Huxley's 1954 book about drug experimentation, The Doors of Perception, which in turn inspired the name of the 1960s rock group The Doors.
"INSTANT MBA: 'If You Do Things Without Knowing How They've Always Been Done, You're Guaranteed To Do Them Differently'" by Patricia Laya, www.businessinsider.com. July 25, 2011.