Yes, the human body needs blood. It needs to manufacture red and white cells and platelets and redistribute them evenly, smoothly, to all the right places, on time, or else. But that day-to-day business of the human body isn't our mission as human beings. It's a basic process that enables our higher aims, and life always strives to transcend the basic processes of living---and at some point in the late 1970s, I did, too.