Om - the Most Sacred Syllable in Hinduism

Om

Aum (also Om, ) is the most sacred syllable in Hinduism, symbolizing the infinite Brahman and the entire Universe. This syllable is sometimes called the "Udgitha" or "pranava mantra" (primordial mantra), because it is considered to be the primal sound, and because most mantras begin with it. It first appeared prominently in the Vedic Tradition. As a seed syllable (bija), it is also considered holy in Esoteric Buddhism.

The Aum symbol is a ligature of Devanagari ओ+ँ (oṃ, encoded in Unicode at U+0950 ॐ, the Tibetan script variant ༀ at U+0F00).

The Significance of the Symbol Om

The symbol Om (also called Pranava), is the most sacred symbol in Hinduism. Volumes have been written in Sanskrit illustrating the significance of this mystic symbol. Although this symbol is mentioned in all the Upanishads and in all Hindu scriptures, it is especially elaborated upon in the Taittiriya, Chandogya and Mundaka Upanishads. From the Katha Upanishad (- I, ii, 15-17):

The goal, which all Vedas declare, which all austerities aim at, and which humans desire when they live a life of continence, I will tell you briefly it is Om. The syllable Om is indeed Brahman. This syllable Om is the highest. Whosoever knows this symbol obtains all that he desires. This is the best support; this is the highest support. Whosoever knows this support is adored in the world of Brahman.

The symbol of Om consists of three curves, one semicircle and a dot. The lower curve denotes the waking state, the upper curve denotes deep sleep, and the right-side curve (which lies between deep sleep and the waking state) signifies the dream state. These three states of an individual's consciousness, and therefore the entire physical phenomenon, are represented by the three curves. The dot signifies the Absolute (fourth or Turiya state of consciousness), which illuminates the other three states. The semicircle symbolizes Maya and separates the dot from the other three curves. The semicircle is open on the top, which means that the absolute is infinite and is not affected by maya. Maya only affects the manifested phenomenon. In this way the form of Om symbolizes the infinite Brahman and the entire Universe and the world. Aum is made out of the three gods Shiva and Ganesh and Gayatri.

Uttering the monosyllable Om, the eternal world of Brahman, One who departs leaving the body (at death), he attains the superior goal.

-Bhagavad Gita, 8.13

When OM is a part of a place name (for example Omkareshwar), or is used as a man's name, it is spelled phonetically using ordinary letters of whatever Indian alphabet is used in the area.

Aum in Hindu tradition

Origin

Devanagari AumFound first in the Vedic scriptures of Hinduism, Aum has been seen as the first manifestation of the unmanifest Brahman (the single Divine Ground of Hinduism) that resulted in the phenomenal universe. Essentially, all the cosmos stems from the vibration of the sound 'Aum' in Hindu cosmology. Indeed, so sacred is it that it is prefixed and suffixed to all Hindu mantras and incantations. It is undoubtedly the most representative symbol of Hinduism.

The OM symbol's left part, which looks like a figure 3, looks like the form of the ū vowel used as a syllable with no attached initial consonant (in the Devanagari script ऊ (Unicode U+090A); but it is actually based on a Brahmi version of ओ (the vowel ō as written without an initial consonant). The nasal sound is indicated by a chandrabindu (U+0901).

Philosophy of AUM

Aum symbol used in a parade in BangaloreAccording to Hindu philosophy this syllable is combined of three components: the letter A (alpha), which represents creation, when all existence issued forth from Brahma's golden necleus; the letter U, which refers to Vishnu the god of the middle who preserves this world by balancing Brahma on a lotus above himself. The letter U with the A, produces the sound of the long Ō (omega). The M produces the prolonged resonance of the nasal cavity with the mouth closed: it is the final part of the cycle of existence, when Vishnu falls asleep and Brahma has to breathe in so that all existing things have to disintegrate and are reduces to their essence to him. This is the M of Mahesha, also known as the great Lord Shiva, whose long period of yoga begins so that the sensual world ceases to exists.

Gods and Goddesses are sometimes referred to as Aumkar, which means Form of Aum, thus implying that who are limitless, the vibrational whole of the cosmos. Ek Onkar, meaning 'one god' is a central tenet of Sikh religious philosophy. 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 concept of describing reality as vibrations, or rhythmic waves, can also be found in quantum physics and superstring theory, which describe the universe in terms of vibrating fields or strings.)

Aum symbol on the Temple elephant's foreheadIn advaita philosophy it is frequently used to represent three subsumed into one, a common theme in Hinduism. It implies that our current existence is mithya, or 'skewed reality,' that in order to know the full truth we must comprehend beyond the body and intellect and intuit the true nature of infinity, of a Divine Ground that is imminent but also transcends all duality, being and non-being, that cannot be described in words. Within this metaphysical symbolism, the three are represented by the lower curve, upper curve and tail of the ॐ subsumed into the ultimate One, represented by the little crescent moon-shape and dot, known as chandrabindu. Essentially, upon moksha, mukti, samadhi, nirvana, liberation, etc. one is able not only to see or know existence for what it is, but to become it. In attaining truth one simply realizes fundamental unity; it is not the joining together of a prior manifold splitting. When one gains true knowledge, there is no split between knower and known: one becomes knowledge/consciousness itself. In essence, Aum is the signifier of the ultimate truth that all is one.

For the scriptural esoteric explanation of Aum see Mandūkya Upanishad.

Dvaita (Vaishnava) philosophies teach that 'Aum' is an impersonal sound representation of Vishnu/Krishna

...