Although this question appears to be short and simple, it concerns a very profound subject discussed in our philosophical works.According to the Upanishads, which have been accepted as the supreme authority by all sections of Hinduism, man is essentially the 'Atman'.The Atman is uncreated and eternal. It is beyond birth, growth, decay or death, which are changes that pertain only to the body. This Atman is of the nature of Existence (sat), Consciousness (cit) and Bliss (ananda). When this fact is directly experienced, our essentially blissful nature is fully manifest. It is this state that is described as Moksha . In this state there is total annihilation of all sorrow and suffering. This is the primary purpose of human life.