Evil Permitted for the Sake of Love

"He who doesn't love doesn't know God, for God is love" (1 John 4:8). Everything Scripture says about why evil's possibility exists at all traces back to that one identity claim — not a rule imposed on God from outside, but a description of who he already, necessarily is.
If love requires freedom, and if rejecting God's love is itself a form of evil, then love necessarily requires the possibility of evil — not its necessity, only its possibility. That distinction matters enormously and is easy to blur. Freedom itself does not require that evil ever actually occur; had no creature ever rebelled, there would have been no evil at all, only a creation freely, joyfully faithful. The claim that love permits the possibility of its own rejection is not a philosophically convenient excuse smuggled in by theologians trying to get God off the hook. It is anchored directly in God's own nature: God is love, and "he cannot deny himself" (2 Timothy 2:13) — meaning he cannot act against his own essential character even to avoid a difficult consequence of it. Love that requires the possibility of rejection flows necessarily from what God already is, not from some limitation forced upon him against his will. And this is precisely why the position categorically denies that any specific evil was ever necessary for good to occur — a claim Scripture rules out directly and without qualification: "Let us do evil, that good may come? Those who say so are justly condemned" (Romans 3:8).
So the permission of evil's possibility is not a loophole or a shrug. It is love, examined all the way down to its foundations, refusing to be anything less than real. A God who removed every possibility of rejection would not be protecting love. He would be eliminating it — and calling the empty result by love's name.