The double meaning of "sense" in the title intends to specify our common sense about the use of self while articulating the sense of self as a sensory function in the neurobiology of the brain. Current developmental and clinical research offers insight into how self functions as a sensory process in survival and well-being, but this essay is not intent on proof. Proof would require more research to substantiate what all of us can know about the sense of self through everyday experience. This book will provide further distinction to this perspective.