by Chakrabhand Posayakrit, Thailand
In the Upanishads, there are numerous statements and illustrations of the greatness of Vāyu, the Brihadaranyaka Upanishad states that the gods who control bodily functions once engaged in a contest to determine who among them is the greatest. When a deity such as that of vision would leave a man's body, that man would continue to live, albeit as a blind man and having regained the lost faculty once the errant deity returned to his post. One by one the deities all took their turns leaving the body, but the man continued to live on, though successively impaired in various ways. Finally, when Mukhya Prāna started to leave the body, all the other deities started to be inexorably pulled off their posts by force, "just as a powerful horse yanks off pegs in the ground to which he is bound." This caused the other deities to realize that they can function only when empowered by Vayu, and can be overpowered by him easily. In another episode, Vāyu is said to be the only deity not afflicted by demons of sin who were on the attack. The Chandogya Upanishad states that one cannot know Brahman except by knowing Vāyu as the udgitha (the mantric syllable om).