...Every living being longs always to be happy, untainted by sorrow; and everyone has the greatest love for himself, which is solely due to the fact that happiness is his real nature. Hence, in order to realise that inherent and untainted happiness, which indeed he daily experiences when the mind is subdued in deep sleep, it is essential that he should know himself. For obtaining such knowledge the enquiry, 'Who am I?' in quest of the Self is the best means. 'Who Am I?' I am not this physical body, nor am I the five organs1 of sense perception; I am not the five organs of external activity , nor am I the five vital forces, nor am I even the thinking mind. Neither am I that unconscious state of nescience which retains merely the subtle vasanas (latencies of the mind), while being free from the functional activity of the sense-organs and the mind, and being unaware of the existence of the objects of sense- perception...