The pranava mantra, the seed syllable symbolizing the limitless vibrational whole of the cosmos. In Hindu metaphysics, it is proposed that the manifested cosmos (from Brahman) has name and form (nama-rupa), and that the closest approximation to the name and form of the universe is Aum, since all existence is fundamentally composed of vibration.
This is considered by some to be remniscent of some current physical theories such as quantum physics and super string theory, which describe the universe in terms of vibrating fields or strings. A – emerges from the throat, originating in the region of the navel U – rolls over the tongue M – ends on the lips A – waking, U – dreaming, M – sleeping It is the sum and substance of all the words that can emanate from the human throat. It is the primordial fundamental sound symbolic of the Universal Absolute. In fact, when correctly pronounced, or rather, "rendered", the "A" can be felt as a vibration that manifests itself near the navel or abdomen; the "U" can be felt vibrating the chest, and the "M" vibrates the cranium or the head. The abdominal vibration symbolises Creation; It is interesting that the "creative" or reproductive organs are also located in the lower abdomen. The vibration of the chest represents Preservation, which is also where the lungs are situated (the lungs sustain or preserve the body through breath).
The vibration of the head is associated with Destruction or sacrifice, since all that gives up or destroys is first destroyed mentally. Hence, the entire cycle of the universe and all it contains is said to be symbolised in AUM.