Series 2, Chapter 21 pg 533, Para 2: How then is this to be done? First, says the Gita, through a union of our purified intelligence with the pure spiritual substance in us by the yoga of the buddhi, buddhya visuddhaya yuktah. This spiritual turning of the buddhi from the outward and downward to the inward and upward look is the essence of the Yoga of knowledge. The purified understanding has to control the whole being, atmanam niyamya; it must draw us away from attachment to the outward-going desires of the lower nature by a firm and a steady will, dhrtya, which in its concentration faces entirely towards the impersonality of the pure spirit. The senses must abandon their objects, the mind must cast away the liking and disliking which these objects excite in it, — for the impersonal self has no desires and repulsions; these are vital reactions of our personality to the touches of things and the corresponding response of the mind and senses to the touches is their support and their basis. An entire control has to be acquired over the mind, speech and body, over even the vital and physical reactions, hunger and cold and heat and physical pleasure and pain; the whole of our being must become indifferent, unaffected by these things, equal to all outward touches and to their inward reactions and responses. This is the most direct and powerful method, the straight and sharp way of Yoga. There has to be a complete cessation of desire and attachment, vairagya; a strong resort to impersonal solitude, a constant union with the inmost self by meditation is demanded of the seeker. And yet the object of this austere discipline is not to be self-centred in some supreme …