A perfected sex circuit and a successful sex union. And there can be no successful sex union unless the greater hope of purposive, constructive activity fires the soul of the man all the time: or the hope of passionate, purposive destructive activity: the two amount religiously to the same thing, within the individual. Sex as an end in itself is a disaster: a vice. But an ideal purpose which has no roots in the deep sea of passionate sex is a greater disaster still. And now we have only these two things: sex as a fatal goal, which is the essential theme of modern tragedy: or ideal purpose as a deadly parasite. Sex passion as a goal in itself always leads to tragedy. There must be the great purposive inspiration always present. But the automatic ideal-purpose is not even a tragedy, it is a slow humiliation and sterility.