The first two words of the Kena, like the first two words of the Isha, concentrate into a single phrase the subject of the Upanishad and settle its bounds & its spirit. By whom is our separate mental existence governed? Who is its Lord & ruler? Who sends forth the mind—kena preshitam, who guides it so that it falls in its ranging on a particular object and not another (kena patati)? The mind is our centre; in the mind our personal existence is enthroned. Manomayah pranasariraneta pratisthito 'nne, a mental guide and leader of the life & body has been established in matter, and we suppose & feel ourselves to be that mental being. But what guides the mind itself? Is it the mental ego as the unreflecting thinker usually & naturally supposes? As a matter of fact, it is perfectly within our knowledge and experience that the mental [ego] guides our actions only partially and imperfectly; it is governed by other forces, it is driven often by impulses that it cannot understand, it receives indications from a superconscious source; it is associated in the body with an immense amount of subconscious action of which it is ignorant or over which it has only a partial control. Guide & leader, perhaps, but certainly not the master. Who then is the master? Mind is not all we are. There is a vital force in us independent of mind. For although the two work together & act upon each other, they are still different movements. Our life goes on or ceases, rests or is active caring nothing, after all, about the mind & its notions. It serves it as a master whose interests it cannot afford to neglect, but does not always obey it & insists on the rights of its own separate existence. Who sent out this life force, who yoked it or applied it to these bodies & these actions, kena praiti yuktah Pranah prathamah—the epithet is used to indicate the essential life force as distinct from the particular life-functions called in Vedantic psycho-physics the five pranas.

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The Kena Upanishad is remarkable for its omissions. It omits to tell us what in relation to the transcendent & immanent Brahman this mind, life, sense activity really are. It omits even to mention one tattwa which one would think as important as mind, life & sense-activity—there is no least reference to matter. These omissions are remarkable; they are also significant. The Sage of the Kena Upanishad has a distinct object in view; he has selected a particular province of knowledge. He is careful not to admit anything which does not bear upon that object or to overstep the strict limits of that province. Matter is beyond his immediate field, therefore he makes no reference to matter. Careless of comprehensiveness, he keeps to the exact matter of his revelation—the working relations between man's mental life and his supreme Existence. With the same scrupulous reserve he abstains from the discussion of the nature of these organs & their essential relation to the supreme Existence. For this knowledge we have to resort to other Scriptures.

The subject of the Talavakara Upanishad is indicated and precisely determined by its opening word, Kena, very much as we have seen the subject of the Isha Upanishad to be indicated and precisely determined by its opening words Isha Vasyam. To reveal the true Master of our mental life, the real Force of the Vitality which supports it and of the sense-activities which minister to it and of the mentality which fulfils it in this material existence, is the intention of the Upanishad.

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