Keller on God's commitment to end suffering...

The Cross means that God is so committed to ending the suffering and brokenness of the world that he would himself become embroiled in it and pay the ultimate cost! And if we ask: "Why isn't the suffering over yet?" the answer is: "We don't know, but here's the proof that he's committed to it! The cross!" Only Christianity has a God who has suffered, proving his commitment to us in our brokenness.

- Tim Keller