Sri Aurobindo
Letters of Sri Aurobindo
Volume I - Part 4
There is no reason why your present condition should be more than a passing phase, unless you yourself choose that it should be otherwise. If it is the “imposition” of the rule of Karmayoga on you that is the cause of your doubts, it is unjustified, because there is no imposition or compulsion, and you need only work if you wish to do so; if you think that by sitting in meditation only you will best progress, you are free to do it.
I did not answer to your statement of your doubts, because they seem to repose on certain statements and suppositions about myself (which are quite inaccurate) and I do not usually care to enter into personal matters. I do not know who gave you this information, e.g. that I have not done my sadhana in full 
heat of work but have had to lead a very quiet and extremely retired life all the time. I am afraid, whoever he is, he knows nothing about either my past life or my present life or my Yoga. As for the ground put forward that there is no precedent for progress during work or for such a method, nor have people in the past been able to do it, it amounts to a statement that there has never been any such thing as Karmayoga or a Karmayogi, that the Gita was never written or was not founded on any truth of experience and that no Yogi ever did works as part of his sadhana. There seems to be some exaggeration in these statements from whatever quarter they may have been breathed into your mind. I have never said that the Supermind is working in the sadhaks here; I have said the contrary in many letters.
I say so much however only to indicate the quite gratuitous character of the affirmations on which these doubts are founded – from wherever they may come. But a detailed answer is hardly necessary; for meditation is not forbidden in this sadhana. Except for those who prefer to go through work alone, meditation and works and bhakti each in its place make up the foundations of the sadhana. But you are free to follow the way of meditation alone, as some others do, if you think that better.