the brain hears through the ears. this human spirit cannot think. the brain thinks – although the spirit imparts the power to think, whereas brute animal brains without such spirit cannot, except in the most elementary manner.

Make this proper case.
The brain hears through the ears. This human spirit cannot think. The brain thinks – although the spirit imparts the power to think, whereas brute animal brains without such spirit cannot, except in the most elementary manner.