Sri Aurobindo
Letters of Sri Aurobindo
Volume 2. 1934 — 1935
These poems are quite new in manner – simple and precise and penetrating. What you describe is the psychic fire, agni pāvaka, which burns in the deeper heart and from there is lighted in the mind, the vital and the physical body. In the 
mind it becomes a light of intuitive perception and discrimination which sees at once what is the true vision or idea and the wrong vision or idea, the true feeling and the wrong feeling, the true movement and the wrong movement. In the vital it becomes a fire of right emotion and a kind of intuitive feeling, a sort of tact which makes for the right impulse, the right action, the right sense of things and reaction to things. In the body it becomes a similar but still more automatic correct response to the things of physical life, sensation, body experience. Usually it is the psychic light in the mind that is first lit of the three, but not always – for sometimes it is the psycho-vital flame that takes precedence.
In ordinary life also there is no doubt an action of the psychic – without it man would be only a thinking and planning animal. But its action there is very much veiled, needing always the mental or vital to express it, usually mixed and not dominant, not unerring therefore; it does often the right thing in the wrong way, is moved by the right feeling but errs as to the application, person, place, circumstance. The psychic, except in a few extraordinary natures, does not get its full chance in the ordinary consciousness; it needs some kind of Yoga or sadhana to come by its own and it is as it emerges more and more “in front” that it gets clear of the mixture. That is to say, its presence becomes directly felt, not only behind and supporting, but filling the frontal consciousness and no longer dependent or dominated by its instruments – mind, vital and body, but dominating them and moulding them into luminosity and teaching them their own true action.
It is less easy to say whether the poems are esoteric; for these words “esoteric” and “exoteric” are rather ill-defined in their significance. One understands the distinction between exoteric and esoteric religion – that is to say, on one side, creed, dogma, mental faith, religious worship and ceremony, religious and moral practice and discipline, on the other an inner seeking piercing beyond the creed and dogma and ceremony or finding their hidden meaning, living deeply within in spiritual and mystic experience. But esoteric poetry? 
Perhaps what deals in an occult way with the occult may be called esoteric – e.g., the “Bird of Fire,” “Trance,” etc. “The Two Moons”1 is, it is obvious, desperately esoteric. But I don’t know whether an intimate spiritual experience simply and limpidly told without veil or recondite image can be called esoteric – for the word usually brings the sense of something kept back from the ordinary eye, hidden, occult. Is “Nirvana” for instance an esoteric poem? There is no veil or symbol there – it tries to state the experience as precisely and overtly as possible. The experience of the psychic fire and psychic discrimination is an intimate spiritual experience, but it is direct and simple like all psychic things. The poem which expresses it may easily be something deeply inward, esoteric in that sense, but simple, unveiled and clear, not esoteric in the more usual sense. I rather think, however, the term “esoteric poem” is a misnomer and some other phraseology would be more accurate.