The human brain is the most complex arrangement of matter in the universe and modern brain research is adding to this wonder.
But medical researchers are learning that if the part of the brain that controls your left hand, for example, is damaged beyond repair, other parts of the brain will take over for the injured part. This doesn't always happen automatically, however. It takes effort on your part.
If you don't use the hand, the brain won't work very hard to re-assign its function to another part of the brain. It also works the other way. Even if the brain isn't damaged, failure to use your left arm will result in a shrinkage of the brain area that controls it. So pianists, for example, will have a growth in the area of the brain controlling their skills, if they practice.
These discoveries fill us with more wonder over the incredible abilities of the brain. But they also tell us something about ourselves. We are not, as many think, locked into certain bad habits or sins. We are learning that the transformation of our minds by God's power is not only something that happens spiritually - physical changes take place in our brains as a result of our behavior. Is your mind being transformed by the power of God, or is it being conformed to the world.