Sri Aurobindo
Letters of Sri Aurobindo
Volume III - Part 3
As for the letter, I suppose you will have to tell the writer that his father committed a mistake when he took up Yoga without a guru – for the mental idea about a Guru cannot take the place of the actual living influence. This Yoga especially, as I have written in my books, needs the help of the Guru and cannot be done without it. The condition into which his father got was a breakdown, not a state of siddhi. He passed out of the normal mental consciousness into a contact with some intermediate zone of consciousness (not the spiritual) where one can be subjected to all sorts of voices, suggestions, ideas, so-called inspirations which are not genuine. I have warned against the dangers of this intermediate zone in one of my books1. The sadhak can avoid entering into this zone – if he enters, he has to look with indifference on all these things and observe them without lending any credence; by so doing he can safely pass into the true spiritual light. If he takes them all as true or real without discrimination, 
he is likely to land himself in a great mental confusion and if there is in addition a lesion or weakness of the brain – the latter is quite possible in one who has been subject to apoplexy – it may have serious consequences and even lead to a disturbance of the reason. If there is ambition or other motive of the kind mixed up in the spiritual seeking, it may lead to a fall in the Yoga and the growth of an exaggerated egoism or megalomania – of this there are several symptoms in the utterances of his father during the crisis. In fact one cannot or ought not to plunge into the experiences of this sadhana without a fairly long period of preparation and purification (unless one has already a great spiritual strength and elevation). Sri Aurobindo himself does not care to accept many into his path and rejects many more than he accepts. It would be well if he can get his father to pursue the sadhana no farther – for what he is doing is not really Sri Aurobindo’s Yoga but something he has constructed in his own mind and once there has been an upset of this kind, the wisest course is discontinuance.