Lets suppose that that you were able every night to dream any dream you wanted to dream, and that you could for example have the power within one night to dream 75 years in time, or any length in time you wanted to have. And you would naturally as you began on this adventure of dreams, you would fulfill all your wishes. you would have every kind of pleasure you could perceive and after several nights of 75 years of total pleasure each you would say "well that was pretty great" but now lets have a surprise, lets have a dream which isn't under control. well something is going to happen to me that i don't know what its going to be. and you would dig that and come out of that and say "that was a close shave wasn't it?" And then you would get more and more adventurous, and you would make further and further out-gambles of what you would dream. and finally you would dream, where you are now. you would dream the dream of living the life you are actually living today.