The first thing to say about evil is that it is a reality, and we should not pretend that there is no such thing. Christian Scientists, like Hindu mystics, want to think it away as an illusion; others would see it as good in the making, or good misunderstood. But in the Bible evil is as real as good, and the distinction between them is ultimate.
The second thing to say about evil is that it is an irrational and meaningless reality, making no sense, and only definable as good perverted.
The third thing to say about evil is that God is handling it. At the cost of Calvary he has taken responsibility for bringing good out of it; already he has triumphed over it, and eventually he will eliminate it. The Christian contemplating evil is not a pessimist, for he knows that one day this mad and meaningless reality that destroys good shall be destroyed itself. Christ ensured this by conquering cosmic evil on the cross (see Colossians 2:15); he will finally snuff it out at his return.
On that day the Christian expects to see that out of all his embroilments with the evil in and around him has come greater good for him, and greater glory for God, than could have been otherwise. That will finally vindicate the goodness and wisdom of God in giving evil so long a run in his world.
Packer, J. I. (2007). Praying the Lord’s Prayer. Crossway Books.