From his take on the Parable of the Unjust Judge (Luke 18:1-8).
And there, if you will, is the ultimate dilemma of the church. The one thing it doesn’t dare try to sell–for fear of being laughed out of town–turns out to be the only thing it was sent to sell. But because it more often than not caves in to its fear of ridicule, it gives the world the perennial spectacle of an institution eager to peddle anything but its authentic merchandise. I can stand up in the pulpit and tell people that God is angry, mean, and nasty; I can tell them he is so good they couldn’t possibly come within a million miles of him; and I can lash them into a frenzy of trying to placate him with irrelevant remorse and bogus good behavior–with sacrifices and offerings and burnt offerings and sin offerings, all of which are offered by the law (Heb 10:8); but I cannot stand there and tell them the truth that he no longer cares a fig for their sacred guilt or their precious lists of good deeds, responsible outlooks, and earnest intentions. I can never just say to them that God has abolished all those oppressive, godly requirements in order that he might grant them free acceptance by his death on the cross. Because when I do that, they can conclude only one of two things: either that I am crazy or that God is. But alas, God’s sanity is the ultimate article of their non-faith. Therefore, despite Scripture’s relentless piling up of proof that he is a certifiable nut–that he is the Crazy Eddie of eternity, whose prices are insane–it always means that I am the one who gets offered a ticket to the funny farm.
Which is all right, I guess. After the unjust steward, the unjust judge, and the God who hasn’t got the integrity to come down from the cross and zap the world into shape, it’s a nice, rough approximation of justification by grace alone, through faith.