Evil is the product of the misuse of God-given freedom and that the possibility that free beings might choose evil rather than good is a necessary part of human freedom .As it is logically impossible for God to create a free being who automatically does what is right (in this case there would be no freedom) he has therefore introduced into the creation a freedom which is neither conditioned nor predetermined .he has chosen to create a world in which there are free creatures because it is the best possible way towards the kind of people God ultimately desires .God is omnipotent, omniscient and wholly good but that it was not within God’s power to create a world containing moral good without creating one containing the possibility of moral evil. The risk of evil is therefore a necessary part of free existence and is incompatible with neither the power nor the love of God.

The Satan Syndrome, Nigel Wright, Zondervan, 1990, pp. 81-2