Thinking,however, can be attributed to the brain (physical). Meditation till you are but self, is very beneficial , in the physical world. This is because the things that affect us emotionally are still attribute of the physical world. If there is an after life, then we won't operate with respect to the priorities of the physical world in all totality.
Thinking is a of the mind not the brain, just as your computer is not the internet. Also, your dreams effect you emotionally and they are not the physical world. I wrote some other blogs on similar subjects that might give some context to this one if this sort of subject interests you.