Who am I??

Upanishads have been considered to be the source or essence of religion--the need for the religious practise & its goal. In one of the upanishads, Chapter 3 Part I of Taittiriya Upanishad the sage asks his fellow members, "Ko-ayam-atma-iti vayam-upaasmahey?"[Who is this Soul, upon which we meditate?". The other enlightened ones reply, "The soul is by which you can smell, hear, eat, see, talk". In other words, the Soul has been defined by a vital force, or in words of Swami Vivekananda, "Powerhouse of energy". The Soul, which we possess is no different from Supreme Soul, which we call "Paramatma". It is the Jeevatma[the human soul] a part of Paramatma[Supreme Soul]. Take this example, the sea & a bucket of water, rendered from sea. The sea is without a form, but the same water when kept in a bucket has a form. When the same water is thrown into the sea, it loses its form & merges with the sea.
"Who am I?", is an eternal question. A popular proverb, "Know thyself", perhaps originates from the ideas of Upanishad, "Atmanam Biddhi". There is a very nice story in Chhandogya Upanishad, which ends up in teaching son Uddalak by his venerable father, Sage Swetaketu, "Tat twam-asi", You are the one. Considered as one of the four mahavakyas[Great Statements] of the Shankaracharya Maths.
It may sound easy, but the approach to found the answer for "Who am I?" has been difficult. There are stages which are equal for either rise or fall. Kath Upanishad describes that path "Kshurasya dhara nishita duratyayaa durgama-pathah-tat kabayo vadanti", that path towards wisdom or truth is as sharp as razor & very difficult to go through, as said by learned people.
But what is the way to find the truth, to find the "Self"?There must be a way out. Upanishads suggest practise distinguishing  what is absolute, immortal & what is subjected to six forms of decay. "Neti, Neti", not this one, not this one till you reach the highest state of self-realisation.
And after self-realisation?Well, he becomes a king, a monarch, such says Swetaswatara Upanishad. "He becomes the overall ruler".
Om Shantih!!!