Schopenhauer

We know that our consciousness inhabits a physical body, similar to other physical objects only known as phenomena. Yet our consciousness is not commensurate with our body. Most of us possess the power of voluntary motion. We usually are not aware of our lungs' breath, or our heartbeat, unless our attention is called to it. Our ability to control either is limited. Our kidneys command our attention on their schedule rather than one we choose. Few of us have any idea what our livers are doing right now, though this organ is as needful as lungs, heart, or kidneys. The conscious mind is the servant, not the master, of these and other organs. These organs have an agenda which the conscious mind did not choose, and has limited power over.

http://en.wikipedia.org/wiki/Arthur_Schopenhauer

Of course!