Freud insisted that a developing infant must experience frustration if he is ever to perceive an independently existing world. It is from the disappointment that the breast cannot forever magically meet the infant’s wishful lips that the infant begins to differentiate himself from the world. And it is through all the frustrating descendants of this primal frustration that the world comes to have psychological reality for him. A necessary condition of there being a world for this person is that it be a world that is not immediately responsive to his wishes. And so, one might say it is the essence of the world that it could never be better than good enough.
Jonathan Lear – Love and Its Place in Nature p.157