... the Upanishads speak of jyotir brahma, the Light that is Brahman. Very often the sadhak feels a flow of Light upon him or around him or a flow of Light invading his centres or even his whole being and body, penetrating and illumining every cell and in that Light there grows the spiritual consciousness and one becomes open to all or many of its workings and realisations. Appositely I have a review of a book of Ramdas (of the Vision) before me in which is described such an experience got by the repetition of the Rama mantra, but, if I understand rightly, after a long and rigorous self-discipline. "The mantra having stopped automatically, he beheld a small circular light before his mental vision. This yielded him thrills of delight. This experience having continued for some days, he felt a dazzling light like lightning, flashing before his eyes, which ultimately permeated and absorbed him. Now an inexpressible transport of bliss filled every pore of his physical frame." It does not always come like that—very often it comes by stages or at long intervals, at first, working on the consciousness till it is ready. <ref>https://incarnateword.in/cwsa/29/bhakti-yoga-and-vaishnavism#p48</ref>
=Mantra And Creation=
The mantra is the spoken word which has a creative power. <ref>http://incarnateword.in/cwm/07/26-october-1955#p16</ref>
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But, in fact, speech is creative. It creates forms of emotion, mental images and impulses of action. The ancient Vedic theory and practice extended this creative action of speech by the use of the Mantra. The theory of the Mantra is that it is a word of power born out of the secret depths of our being where it has been brooded upon by a deeper consciousness than the mental, framed in the heart and not constructed by the intellect, held in the mind, again concentrated on by the waking mental consciousness and then thrown out silently or vocally—the silent word is perhaps held to be more potent than the spoken—precisely for the work of creation. The Mantra can not only create new subjective states in ourselves, alter our psychical being, reveal knowledge and faculties we did not before possess, can not only produce similar results in other minds than that of the user, but can produce vibrations in the mental and vital atmosphere which result in effects, in actions and even in the production of material forms on the physical plane.<ref>http://incarnateword.in/cwsa/18/the-supreme-word#p8</ref>
==The Vedic Conception Of Mantra==
The name of God, the mantra, is still the keystone of all Indian yoga. We shall not realise the full bearing & rationale of this great Vedic conception unless we first impress on our minds the Vedic idea of existence & creation, for Vak, the Word, is in that idea the effective agent of creation. All created existence is in the Vedic philosophy a formation by force of consciousness, Chit-shakti, not, as modern thought supposes it to be, a formation by Force of unconscious inanimate Being. Creation itself is only a manifestation, phenomenon or appearing in form, vayas, vayunam, víti, [of] that which is already existent as consciousness, but latent as form in universal Being. It is srishti, a loosing forth, vachas, vyachas or shasti, an expressing or bringing out, not a creation in the modern sense, not a new manufacture of that which never before had any sort of existence. Sat or Being in the universe contains all forms as things in themselves in its Chit or self-consciousness, but for all cosmic purposes avyakta, unexpressed, undefined. <ref>http://incarnateword.in/cwsa/16/rv-v-dot-10#p20</ref>
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The Vedic use of the Mantra is only a conscious utilisation of this secret power of the word. And if we take the theory that underlies it together with our previous hypothesis of a creative vibration of sound behind every formation, we shall begin to understand the idea of the original creative Word. Let us suppose a conscious use of the vibrations of sound which will produce corresponding forms or changes of form. But Matter is only, in the ancient view, the lowest of the planes of existence. Let us realise then that a vibration of sound on the material plane presupposes a corresponding vibration on the vital without which it could not have come into play; that, again, presupposes a corresponding originative vibration on the mental; the mental presupposes a corresponding originative vibration on the supramental at the very root of things. But a mental vibration implies thought and perception and a supramental vibration implies a supreme vision and discernment. All vibration of sound on that higher plane is, then, instinct with and expressive of this supreme discernment of a truth in things and is at the same time creative, instinct with a supreme power which casts into forms the truth discerned and eventually, descending from plane to plane, reproduces it in the physical form or object created in Matter by etheric sound. Thus we see that the theory of creation by the Word which is the absolute expression of the Truth, and the theory of the material creation by sound-vibration in the ether correspond and are two logical poles of the same idea. They both belong to the same ancient Vedic system. <ref>http://incarnateword.in/cwsa/18/the-supreme-word#p10</ref>
=Mantra , Brahman And Levels Of Consciousness=