Let-go is not an action on your part, but just an understanding of the fact that this is the only way the universe functions, and if you are not functioning in this way, you are going to remain in misery. You are not being punished, you are simply being foolish.
The old religions have given the idea to people that if you do wrong, you will be punished; if you do right, you will be rewarded — because they were all dependent on doing, and that's their basic fallacy.
Religion begins when you cross the boundary of doing and enter into the world of happening. Then let-go happens, because you see that this is the only way things work. If you go against it, you are miserable.
Nobody is punishing you; you are simply being stupid. If you try to get out through the wall and hit your head, do you think it has been a punishment? And there is the door, always available for you to get out. Knowing about the door, you try to get out through the wall and smash your face. Old religions call it punishment. It is not punishment, it is simple foolishness. And the person who goes out of the door into the garden, in the sun, in the air, is not being rewarded; he is just being intelligent.
So if you ask me, I will say intelligence is the reward; unintelligence is the punishment. In its ultimate form: unintelligence is hell, intelligence is heaven.
OSHO