Sri Aurobindo
Letters of Sri Aurobindo
Volume III - Part 1
Fragment ID: 12201
I do not quite gather what is the nature of this silence and this heat which makes you feel like that. An inner silence is a condition favourable to the sadhana even if for a time it means the cessation of all activity within, all thoughts, emotions or mental perceptions. But it is possible and it does happen that the unaccustomed physical consciousness feels the silence to be dull and a deprivation of intelligence rather than a release and repose, and the strangeness of this inactive condition causes it apprehension and an alarmed perplexity. As for the heat that also may be troublesome and difficult to bear to the physical 

consciousness because it is unaccustomed and gets alarmed and troubled. If it is that we must try to slow down and diminish the intensity of the force that is acting.
But in any case try to dismiss any alarm that may be suggested to you and keep the faith which you express in the last part of the letter.