Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 2
There was and is the opening before you of a new stage in your spiritual development. For it to realise itself you must progress first in two directions. The first we have already pressed on you – the surmounting of these vital temptations and desires which linked you to the lower movements and invited the pressure of a 
hostile Force on your lower vital and your body and the complete surrender of life and body to the One alone. The other is the descent of a full calm and strength and equanimity into these parts so that you may conquer life and its difficulties and do your work for the Divine. This calm and strength had often descended into your mind and higher vital, but these other parts were still open to much weakness and attachment and a self-indulgent movement. That must go if one wants to become a hero and master of spiritual action. In your life at Bogra these things were too much sheltered and allowed to remain; at Shillong you have a chance to be by yourself with the Divine Force and look life in the face from the soul’s inner strength and become master of circumstances. Outer difficulties or inconveniences you should not allow to alarm or depress you. Inner difficulties should also be met with detachment, calm equality, the unshakable will to conquer.
For the rest, you have rightly said, “I must preserve my equanimity and have faith in Divine Guidance when falsehood” – or any trouble or difficulty – “confronts me.” The defect that opened the way to the bodily and other troubles was the faltering in your resolution to conquer the vital and follow the straight and high path and the consequent violent despair and depression it brought in its wake. Let those disappear altogether and do not allow them to rise in that way again. The path of spiritual calm and strength and the consecration of all your forces to the Divine is the one safe way for you and that you must now consistently follow.