Sri M said ...

The Upanishads say that purna - fulfilment, fullness, and completeness - is the essential characteristic of one’s true being, which is one’s own consciousness, free of all distractions, and is called the Atman. When this Atman, or real Self - the core of the consciousness of every human being - is discovered, one reaches a state of perfect happiness and realises that it exists in every living being, though it often remains untapped.