The seat of the soul and the control of voluntary movement - in fact, of nervous functions in general, - are to be sought in the heart. The brain is an organ of minor importance.
A lot of people change for good. Some people just fall off. Just trying to progress in anything, no matter what you're doing, I feel like any progression you make... some people aren't gonna be around you that were around you.
You have inside you the capacity to invest your mental, emotional, and spiritual gifts in a way that glorifies God, impacts the world, and satisfies your own soul. I believe that-and I want you to believe it, too.