“Good Comes From Knowledge of Evil” (CC BY-NC-ND 2.0) by  mr_mark_dollin 

Evil, according to Sri Aurobindo, is not coeval or coterminous with the Divine, it is a later or derivative formation under given conditions, although within the range and sphere of the infinite Divine. Evil exists as a stern reality; even though it may be temporary and does not touch the essential reality, it is not an illusion nor can it be ignored, brushed aside or by-passed as something superficial or momentary and of no importance. It has its value, its function and implication. It is real, but it is not irremediable. It is contrary to the Divine but not contradictory. For even the Evil in its inmost substance carries or is the reality which it opposes or denies outwardly… As we have said, evil is a formation necessitated by certain circumstances, the circumstances changed, the whole disposition as at present constituted changes automatically and fundamentally.

Nolini Kanta Gupta
From ‘The Yoga of Sri Aurobindo Part 4’