Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 4
It is not necessary to put so many questions and get their separate answers. All your ten questions resolve themselves into one. In every human being there are two parts, the psychic with so much 
of the thinking mind and higher (emotional, larger dynamic) vital that is open to the psychic and cleaves to the soul’s aims and admits the higher experiences and on the other hand the lower vital and the physical or external being (external mind and vital included) which are attached to the ignorant personality and nature and do not want to change. It is the conflict between these two that makes all the difficulty of the sadhana. All the difficulties you enumerate arise from that and nothing else. It is only by curing the duality that one can overcome them. That happens when one is able to live within, aware of one’s inner being, identified with it and to regard the rest as not oneself, as a creation of ignorant Nature from which one has separated oneself and which has to disappear and, secondly, when by opening oneself constantly to the Divine Light and Force and the Mother’s presence a dynamic action of sadhana is constantly maintained which steadily pushes out the movements of the ignorance and substitutes even in the lower vital and physical being the movements of the inner and higher nature. There is then no struggle any longer, but an automatic growth of the divine elements and fading out of the undivine. The devotion of the heart and the increasing activity of the psychic being, which is best helped by devotion and self-giving, are the most powerful means for arriving at this condition.