Book excerpt: The nature of consciouness or human awareness is one of the problems of perennial concern to philosphers and psychologists alike. Here is a systematic critical and comparative study the nature of human awareness according to the most influential school of classical Indian thought. After introducing the Advaita Philosophical system and indicating the place of consciouness in this system the author presents a detailed discussion of the Advaitin`s unique non-dual understanding of man`s basic intelligence. He continues with and analysis of the Advaitin`s hierarchical vision of waking dream and dreamless sleep experience and compares this analysi,