Too many people have little regard for their lives, as though they consider it out of their hands and beyond control. Should we just absorb the slings and arrows, or should we look for truth and how to cope with it? There is nothing more crucial to the life of an organism than its nervous system. It is the source of all sensation, action, and motivation. In short, it is the mechanism that sustains life. Sensation is the nervous system's communications facility; it monitors all incoming events that impact the body and directs them to the brain where they can be analyzed and acted upon. To be precisely understood, the brain communicates in just one language-the language of "sensation". Universally used throughout the human nervous system, we see examples of sensation language in its messages to us, such as touch, taste, smell, sound and sight-our five senses. But these are only examples of its extensive use.
Sensation began with life, itself, and evolved from meager beginnings into its enormous variations in modern humans. Within all organisms, the occurrence of each sensation corresponds to a unit of consciousness.
