Sri Aurobindo
Letters of Sri Aurobindo
12. Difficulties of the Path (2)
As to the change of nature, the first step is to become conscious and separate from the old surface nature. For, this rajasic vital nature is a surface creation of Prakriti, it is not the true being; 
however persistent it seems, it is only a temporary combination of vital movements. Behind is the true mental and vital being supported by the psychic. The true being is calm, wide, peaceful. By drawing back and becoming separate one creates the possibility of living in the peace of this inner Purusha and no longer identified with the surface Prakriti. Afterwards it will be much easier to change by the force of the psychic perception and the Peace and Power and Light from above the surface being.