samaya

Om is the original sound of creation Tat or Tut means That or That is Sat or Satya means which does not undergo change or it is everlasting. It is in a broader sense. Like when we say that Energy can not be created nor destroyed. It only changes its form. You can change microwave energy into kinetic energy or thermal energy, but sum total of energy always remains the same. Same way sum total consciousness of the universe remains the same. It might appear in different forms as material energy or individual consciousness but sum total is always the same. That is the meaning of Brahman, an unchanging reality. Sat is also translated as existence or Truth or that which exists ALL the time and does not disappear. Om Tat Sat is a mantra found in the ancient Hindu text, the Bhagavad Gita Chapter 17, Verse 23. It means "Om, that is Truth", "Om, it is Reality", "Om it is good". It is the threefold designation of the Hindu metaphysical concept called Brahman. Brahman is universal consciousness or ALL PERVADING ENERGY. As a mantra used in yoga and meditation, it is one of the most common and most soothing. It is generally translated as "The supreme Absolute Truth” or “All that is.” The individual words are also three different ways of describing Brahman. Om is the sound of Brahman, the vibration or primordial sound. Tat translates as “that” and symbolizes the universal consciousness. Sat means “truth” and represents pure existence or the supreme soul. What is Om Tat Sat? - Definition from Yogapedia Mantras help link the self to the higher Self by awakening or cultivating higher consciousness. Om Tat Sat is one of the most common mantras. The repetitive chanting of this mantra encourages the mind to enter into a meditative state so that the yogi may begin to connect with the higher Self or the Divine within. It is believed to change the person's vibration. Om Tat Sat is recited during religious practices, including the study of the Vedas and at the end of the yajnas (sacrifices). (Sacrifice does not mean animal sacrifice but it means sacrifice ownership) According to the Bhagavad Gita, all religious work or sacrifice should begin with the sound of Om. The sound of tat reminds the faithful to renounce any reward for the work or sacrifice. The sound of sat declares what is good and true, as is work that is done well. This mantra is also used by yogis in India as a greeting with hari (the manifest cosmos), as in “Hari Om Tat Sat.” The greeting is a reminder that individuals are more than the body and earthly life.