Summary: This is a profound must watch talk by Sadhguru. He explains that there are only 3 basic sounds in the existence - 'aa', 'oo' and 'mm'. Without the use of tongue once can only make these 3 sounds. Wherever there is a realized being the sound 'aum' reverberates, however, over a period of time it gets distorted as 'om', 'amen', 'ameen'. He explains the right way of uttering the sound aum, and also the significant health benefits that happen with chanting aum regularly.