Om

This Sanskrit word has much sanctity in Hinduism and it is spoken at the start and finish of each lesson of the Veda. It is also the introductory word of the Puranas. According to the Katha-Unpanishad "whoever knows this syllable obtains whatever he wishes." There are many accounts of where it came from, and a common belief is that it was a term of assent used by the gods. The Manu claims that Brahma himself created the word, and the word is also used by Hindus to describe their spiritual sun.