Where is the place of brain work in the process of changing reality?

Many people try to think hard of what they want, but it almost never materialize this way. How to use brain for making your life balance out wirh your happiness the way you want it? Inevitably you think of what you desire, but if life would follow everyone immediate thoughts, the world would collapse, it would not be balanced. Brain can only balance one thought at a time, we can not use brain to balance the whole reality. We have to use happiness for that. But happiness does not have a brain and can not visualise physical reality. What we know is that there is a connection between brain wants and happiness creations, if brain visualises desire, to make it balanced in to our reality, we need properly let go of it, and submers ourselves in complete and utterly happy acceptance of our current reality. So it seems that the place of the brain is in its ability to not think.