The first thing the will has to do with the body is to impose on it progressively a new habit of all its being, consciousness, force and outward and inward action. It must be taught an entire passivity in the hands first of the higher instruments, but eventually in the hands of the spirit and its controlling and informing Shakti. It must be accustomed not to impose its own limits on the nobler members, but to shape its action and its response to their demands, to develop, one might say, a higher notation, a higher scale of responses. At present the notation of the body and the physical consciousness has a very large determining power on the music made by this human harp of God; the notes we get from the spirit, from the psychic soul, from the greater life behind our physical life cannot come in freely, cannot develop their high, powerful and proper strain. This condition must be reversed; the body and the physical consciousness must develop the habit of admitting and shaping themselves to these higher strains and not they, but the nobler parts of the nature must determine the music of our life and being.
The control of the body and life by the mind and its thought and will is the first step towards this change. All Yoga implies the carrying of that control to a very high pitch. But afterwards the mind must itself give place to the spirit, to the spiritual force, the supermind and the supramental force. And finally the body must develop a perfect power to hold whatever force is brought into it by the spirit and to contain its action without spilling and wasting it or itself getting cracked. It must be capable of being filled and powerfully used by whatever intensity of spiritual or higher mind or life force without any part of the mechanical instrument being agitated, upset, broken or damaged by the inrush or pressure,—as the brain, vital health or moral nature are often injured in those who unwisely attempt Yogic practice without preparation or by undue means or rashly invite a power they are intellectually, vitally, morally unfit to bear,—and, thus filled, it must have the capacity to work normally, automatically, rightly according to the will of that spiritual or other now unusual agent without distorting, diminishing or mistranslating its intention and stress. This faculty of holding, dhāraṇa-śakti, in the physical consciousness, energy and machinery is the most important siddhi or perfection of the body.
The result of these changes will be to make the body a perfect instrument of the spirit. The spiritual force will be able to do what it wills and as it wills in and through the body. It will be able to conduct an unlimited action of the mind or at a higher stage of the supermind without the body betraying the action by fatigue, incapacity, inaptitude or falsification. It will be able too to pour a full tide of the life-force into the body and conduct a large action and joy of the perfected vital being without that quarrel and disparity which is the relation of the normal life-instincts and life-impulses to the insufficient physical instrument they are obliged to use. And it will also be able to conduct a full action of the spiritualised psychic being not falsified, degraded or in any way marred by the lower instincts of the body and to use physical action and expression as a free notation of the higher psychical life. And in the body itself there will be a presence of a greatness of sustaining force, an abounding strength, energy and puissance of outgoing and managing force, a lightness, swiftness and adaptability of the nervous and physical being, a holding and responsive power in the whole physical machine and its driving springs1 of which it is now even at its strongest and best incapable.
This energy will not be in its essence an outward, physical or muscular strength, but will be of the nature, first, of an unbounded life-power or pranic force, secondly, sustaining and using this pranic energy, a superior or supreme will-power acting in the body. The play of the pranic shakti in the body or form is the condition of all action, even of the most apparently inanimate physical action. It is the universal Prana, as the ancients knew, which in various forms sustains or drives material energy in all physical things from the electron and atom and gas up through the metal, plant, animal, physical man. To get this pranic shakti to act more freely and forcibly in the body is knowingly or unknowingly the attempt of all who strive for a greater perfection of or in the body. The ordinary man tries to command it mechanically by physical exercises and other corporeal means, the Hathayogin more greatly and flexibly, but still mechanically by Asana and Pranayama; but for our purpose it can be commanded by more subtle, essential and pliable means; first, by a will in the mind widely opening itself to and potently calling in the universal pranic shakti on which we draw and fixing its stronger presence and more powerful working in the body; secondly, by the will in the mind opening itself rather to the spirit and its power and calling in a higher pranic energy from above, a supramental pranic force; thirdly, the last step, by the highest supramental will of the spirit entering and taking up directly the task of the perfection of the body. In fact, it is always really a will within which drives and makes effective the pranic instrument even when it uses what seem to be purely physical means; but at first it is dependent on the inferior action. When we go higher, the relation is gradually reversed; it is then able to act in its own power or handle the rest only as a subordinate instrumentation.
Most men are not conscious of this pranic force in the body or cannot distinguish it from the more physical form of energy which it informs and uses for its vehicle. But as the consciousness becomes more subtle by practice of Yoga, we can come to be aware of the sea of pranic shakti around us, feel it with the mental consciousness, concretely with a mental sense, see its courses and movements, and direct and act upon it immediately by the will. But until we thus become aware of it, we have to possess a working or at least an experimental faith in its presence and in the power of the will to develop a greater command and use of this prana force. There is necessary a faith, śraddhā, in the power of the mind to lay its will on the state and action of the body, such as those have who heal disease by faith, will or mental action; but we must seek this control not only for this or any other limited use, but generally as a legitimate power of the inner and greater over the outer and lesser instrument. This faith is combated by our past habits of mind, by our actual normal experience of its comparative helplessness in our present imperfect system and by an opposing belief in the body and physical consciousness. For they too have a limiting śraddhā of their own which opposes the idea in the mind when it seeks to impose on the system the law of a higher yet unattained perfection. But as we persist and find this power giving evidence of itself to our experience, the faith in the mind will be able to found itself more firmly and grow in vigour and the opposing faith in the body will change, admit what it first denied and not only accept in its habits the new yoke but itself call for this higher action. Finally we shall realise the truth that this being we are is or can become whatever it has the faith and will to be,—for faith is only a will aiming at greater truth,—and cease to set limits to our possibility or deny the potential omnipotence of the Self in us, the divine Power working through the human instrument. That however, at least as a practical force, comes in at a later stage of high perfection.
The Prana is not only a force for the action of physical and vital energy, but supports also the mental and spiritual action. Therefore the full and free working of the pranic shakti is required not only for the lower but still necessary use, but also for the free and full operation of mind and supermind and spirit in the instrumentality of our complex human nature. That is the main sense of the use of exercises of Pranayama for control of the vital force and its motions which is so important and indispensable a part of certain systems of Yoga. The same mastery must be got by the seeker of the integral Yoga; but he may arrive at it by other means and in any case he must not be dependent on any physical or breathing exercise for its possession and maintenance, for that will at once bring in a limitation and subjection to Prakriti. Her instrumentation has to be used flexibly by the Purusha, but not to be a fixed control on the Purusha. The necessity of the pranic force, however, remains and will be evident to our self-study and experience. It is in the Vedic image the steed and conveyance of the embodied mind and will, vāhana. If it is full of strength and swiftness and a plenitude of all its powers, then the mind can go on the courses of its action with a plenary and unhampered movement. But if it is lame or soon tired or sluggish or weak, then an incapacity is laid on the effectuation of the will and activity of the mind. The same rule holds good of the supermind when it first comes into action. There are indeed states and activities in which the mind takes up the pranic shakti into itself and this dependence is not felt at all; but even then the force is there, though involved in the pure mental energy. The supermind, when it gets into full strength, can do pretty well what it likes with the pranic shakti, and we find that in the end this life power is transformed into the type of a supramentalised prana which is simply one motor power of that greater consciousness. But this belongs to a later stage of the siddhi of the Yoga.
The Yoga of Self Perfection, Synthesis of Yoga – II, CWSA, Sri Aurobindo.