Both good and evil have the right to exist.
The evil has to be used for the purpose for which it is suited.
The skin of the orange is not sweet.
But it helps to protect the sweetness within.
The bitter green skin of the unripe orange protects the fruits during the ripening period.
The skin too gradually takes on some of the sweetness and flavor of the ripening orange.
So too, evil has to be slowly transformed into good by the subtle influence of association.
-Sathya Sai Speaks, Vol 3, Ch 17, 2-Aug-1963