Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 3
As for the feeling of being driven, compelled, that is quite usual when it is the physical nature that is being dealt with; there is no need to be upset or think it cannot be got over. The physical 
is the slave of certain forces which create a habit and drive it through the mechanical force of the habit. So long as the mind gives consent, you do not notice the slavery; but if the mind withdraws its consent, then you feel the servitude, you feel a force pushing you in spite of the mind’s will. It is very obstinate and repeats itself till the habit – the inner habit revealing itself in the outward act – is broken. It is like a machine which once set in motion repeats the same movement. You need not be alarmed or distressed; a quiet persistent aspiration will bring you to the point where the habit breaks and you are free.