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.
If you make it a habit not to blame others, you will feel the growth of the ability to love in your soul, and you will see the growth of goodness in your life.
I see that any materialism in life coarsens the soul, and that the hunger of the body and the appetites of the flesh desecrate always, and often destroy.