Sri Aurobindo
Letters of Sri Aurobindo
Volume II - Part 3
Fragment ID: 11934
See largest or earliest found fragment here
Sri Aurobindo — Unknown addressee
October 2, 1938
If Shankara’s conception of the undifferentiated pure Consciousness as the Brahman is your view of it, then it is not the path of this Yoga that you should choose; for here the realisation of pure Consciousness and Being is only a first step and not the goal. But an inner creative urge from within can have no place in an undifferentiated Consciousness – all action and creation must necessarily be foreign to it.
I do not base my Yoga on the insufficient ground that the Self (not soul) is eternally free. That affirmation leads to nothing beyond itself, or, if used as a starting-point, it could equally well lead to the conclusion that action and creation have no significance or value. The question is not that but of the meaning of creation, whether there is a Supreme who is not merely a pure undifferentiated Consciousness and Being, but the source and support also of the dynamic energy of creation and whether the cosmic existence has for It a significance and a value. That is a question which cannot be settled by metaphysical logic which deals in words and ideas, but by a spiritual experience which goes beyond Mind and enters into spiritual realities. Each mind is satisfied with its own reasoning, but for spiritual purposes that satisfaction has no validity, except as an indication of how far and on what line each one is prepared to go in the field of spiritual experience. If your reasoning leads you towards the Shankara idea of the Supreme, that might be an indication that the Vedanta Adwaita (Mayavada) is your way of advance.
This Yoga accepts the value of cosmic existence and holds it to be a reality; its object is to enter into a higher Truth-Consciousness or Divine Supramental Consciousness in which action and creation are the expression not of ignorance and imperfection, but of the Truth, the Light, the Divine Ananda. 
But for that, surrender of the mortal mind, life and body to that Higher Consciousness is indispensable, since it is too difficult for the mortal human being to pass by its own effort beyond mind to a supramental consciousness in which the dynamism is no longer mental but of quite another power. Only those who can accept the call to such a change should enter into this Yoga.
Current publication:
Sri Aurobindo. Letters on Yoga. II // CWSA.- Volume 29. (≈ 22-24 vol. of SABCL).- Pondicherry: Sri Aurobindo Ashram, 2013.- 522 p.
Other publications: