Tattvamasi (Tat Tvam Asi) is one of the Mahavakyas described in the scriptures and Upanishads of India, which literally means that you are yourself. He is not far, too close, too close by. He is yours.

Before the birth of the universe, devoid of the existence of duality, devoid of name and form, was the only true form, the unique Brahm. The same Brahm still exists today. He is beyond them, despite being in the body and senses. He has only a part in the soul. He experiences with that, but that part is not divine. He is far from it. It is far from being reflected in the whole world.

This mantra is also the Mahavakya of Dwarka Dham or Sharda Math, which is one of the Four Dham`s in India located in the west.

What does Mahavakya mean?
If you follow this one sentence and research the ultimate state of your life, then your life will be fulfilled successfully. Therefore it is called Mahavakya.