The human brain is a combination of two rings called right rings or rings. But since these two are cross-wired , the right ring controls the left side of the body and the left ring controls the right part of the body. The left ring controls speech , myth , arithmetic , logic , language , appetite , digestion and material thoughts. And the right ring controls imagination , emotions , beliefs , sleep , dreams , music , creativity , superconsciousness, etc. These two rings are usually connected by a cluster of nerve fibers called the corpus callosum. But if for some reason this connection is disconnected, then the two rings work independently, that is, people sometimes laugh, sometimes cry , sometimes run, in a word, the two parts of the brain work like themselves which we see in lunatics. Man goes insane only when the normal functioning of the nerves in his brain is disrupted.