22 Jun Mantra Yoga
The Mantra Om: Word and Wisdom
But we are now considering not these Mahâ-purushas, the great Incarnations, but only the Siddha-Gurus (teachers who have attained the goal); they, as a rule, have to convey the gems of spiritual wisdom to the disciple by means of words (Mantras) to be meditated upon. What are these Mantras? The whole of this universe has, according to Indian philosophy, both name and form (Nâma-Rupa) as its conditions of manifestation. In the human microcosm, there cannot be a single wave in the mind-stuff (Chittavritti) unconditioned by name and form. If it be true that nature is built throughout on the same plan, this kind of conditioning by name and form must also be the plan of the building of the whole of the cosmos.
“As one lump of clay being known, all things of clay are known”, so the knowledge of the microcosm must lead to the knowledge of the macrocosm. Now form is the outer crust, of which the name or the idea is the inner essence or kernel. The body is the form, and the mind or the Antahkarana is the name, and sound-symbols are universally associated with Nâma (name) in all beings having the power of speech. In the individual man the thought-waves rising in the limited Mahat or Chitta (mind-stuff), must manifest themselves, first as words, and then as the more concrete forms.
In the universe, Brahmâ or Hiranyagarbha or the cosmic Mahat first manifested himself as name, and then as form, i.e. as this universe. All this expressed sensible universe is the form, behind which stands the eternal inexpressible Sphota, the manifest-er as Logos or Word. This eternal Sphota, the essential eternal material of all ideas or names is the power through which the Lord creates the universe, nay, the Lord first becomes conditioned as the Sphota, and then evolves Himself out as the yet more concrete sensible universe.
This Sphota has one word as its only possible symbol, and this is the Om. (…)
Even as in the case of the least differentiated and the most universal symbol Om, thought and sound-symbol are seen to be inseparably associated with each other, so also this law of their inseparable association applies to the many differentiated views of God and the universe: each of them therefore must have a particular word-symbol to express it. These word-symbols, evolved out of the deepest spiritual perception of sages, symbolize and express, as nearly as possible the particular view of God and the universe they stand for. And as the Om represents the Akhanda, the undifferentiated Brahman, the others represent the Khanda or the differentiated views of the same Being; and they are all helpful to divine meditation and the acquisition of true knowledge.
—Swami Vivekananda, Bhakti Yoga