Sri Aurobindo
Letters of Sri Aurobindo
08. Transformation of the Physical
The condition is that you must bring the sadhana into your 
physical consciousness and live for the sadhana and the Divine only. You must give up positively the bad habits that still persist and never resume those that have ceased or been interrupted. Inner experiences are helpful to the mind and higher vital for change, but for the lower vital and the outer being a sadhana of self-discipline is indispensable. The external actions and the spirit in them must change – your external thoughts and actions must be for the Divine only. There must be self-restraint, entire truthfulness, a constant thought of the Divine in all you do. This is the way for the change of the lower vital. By your constant self-dedication and self-discipline the force will be brought down into the external and the change made.