the Author strongly feels the still immeasurable gap existing between the todays comprehensible neurophysiology concerning somatic and autonomic functions, on the one hand, and the still incomprehensible properties of mind - when approached in the same neurophysiological term- on the other hand. For this reason, the book is first aiming at given an understandable, critically viewed, fundament on the "kernel" of mind:the ideas, their relationship with the corresponding concepts, with the development of thought , with memory, with will. In this book, the Author does not advance neurophysioligal models to put to test, rather, strives to encase the forementioned mind's functional properties and its abstract structures within the same reference framework of physical principles outlined for the somatic and autonomic functions in his preceding volume PRINCIPLES OF THEORETICAL NEUROPHYSIOLOGY (Springer, 1987.)