Let’s suppose that you were able, every night, to dream any dream you wanted to dream; 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 see, and after several nights you would say, well that was pretty great!
But now, let’s have a surprise: let’s have a dream which isn’t under control. Where something is gonna happen to me that i don’t know what it’s gonna be. Then, you would get more and more adventurous, and you would make further and further out gambles as to what you would dream, and finally you would dream… where you are now.
Alan Wilson Watts, Out of Your Mind: The Nature of Consciousness (posthumous, 1998)
New age bullshit of course, but great emotional effect, especially in the following music piece: