Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 2
The reason why quietness is not yet fixed and anger returns is that you allow your physical mind to become active. In regard to the sadhana it begins to think there is this defect in you and that defect and therefore the sadhana does not become immediately effective and perfect. This makes the vital nervous or despondent and in the despondency a state of irritation arises. At the same time this mind becomes active as it has now with regard to X or begins to judge and criticise and this too leads to nervousness and irritation. These things belong to the old mind you are trying to leave and therefore stand in the way of concentration and quietude. They should be stopped at their root by rejecting the suggestions of the physical mind as soon as they begin. A new consciousness is coming based upon inner silence and quietude. You must wait quietly for that to develop. True knowledge, 
true perceptions of people and things will come in that new silent consciousness. The mind’s view of people and things must necessarily be either limited and defective or erroneous – to go on judging by it is now a waste of time. Wait for the new consciousness to develop and show you all in a new and true light. Then the tendency to anger which arises from this mind and is a violent impatience directed against things the mind and vital do not like, would have no ground to rise at all – or if it rose without cause could be more easily rejected. Rely for the sadhana on the Mother’s grace and her Force, yourself remembering always to keep only two things, quietude and confidence. For things and people, leave them to the Mother also; as you have difficulties in your nature, so they have too; but to deal with them needs insight, sympathy, patience.