Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 4
Your statement about the Shakti. The mere intensity of the force 
does not show that it is a bad power; the Divine Force often works with a great intensity. Everything depends on the nature of the force and its working; what does it do, what seems to be its purpose? If it works to purify or open the system, or brings with it light or peace or prepares the change of the thoughts, ideas, feelings, character in the sense of a turning towards a higher consciousness, then it is the right force. If it is dark or obscure, or perturbs the being with rajasic or egoistic suggestions or excites the lower nature, then it is an adverse Force.