The three words Om Tat Sat represent the essence of Hindu philosophy.
Om means the absolute, endless, eternal spirit of God and Truth. It is a powerful term in meditation. Sometimes in meditation we can feel this word ringing within. Hindus assert that the word Om has the power to wake up our spirit and reveal our inner light.
Tat is a complex word meaning simply that or more deeply “That” that is. In the phrase Om Tat Sat, the word Tat implies that God is a truth or a force.
Sat means true or real. Sat says that what is true is real and what is real is true. PureSat is light and happy and lasts forever. Hindu philosophy views the temporal world we perceive as illusionary or as maya. Although the world of perception is measurable and verifiable, it is not real because it is mutable and subject to destruction. Sat transcends the universe.