The first necessity is to dissolve that central faith and vision in the mind which concentrate it on its development and satisfaction and interests in the old externalised order of things. It is imperative to exchange this surface orientation for the deeper faith and vision which see only the Divine and seek only after the Divine. The next need is to compel all our lower being to pay homage to this new faith and greater vision. All our nature must make an integral surrender; it must offer itself in every part and every movement to that which seems to the unregenerated sense-mind so much less real than the material world and its objects. Our whole being—soul, mind, sense, heart, will, life, body—must consecrate all its energies so entirely and in such a way that it shall become a fit vehicle for the Divine. This is no easy task; for everything in the world follows the fixed habit which is to it a law and resists a radical change. And no change can be more radical than the revolution attempted in the integral Yoga. Everything in us has constantly to be called back to the central faith and will and vision. Every thought and impulse has to be reminded in the language of the Upanishad that “That is the divine Brahman and not this which men here adore.” Every vital fibre has to be persuaded to accept an entire renunciation of all that hitherto represented to it its own existence. Mind has to cease to be mind and become brilliant with something beyond it. Life has to change into a thing vast and calm and intense and powerful that can no longer recognise its old blind eager narrow self of petty impulse and desire. Even the body has to submit to a mutation and be no longer the clamorous animal or the impeding clod it now is, but become instead a conscious servant and radiant instrument and living form of the spirit.
CWSA 23: 72 – 73