From Forward the Mage, by Eric Flint & Richard Roach (Baen Books, 2002; ISBN: 0-7434-3524-9 1, LC: PS3556.L548 F67 2002, DD: 813'.54--dc21 2001056468)
"They're crazier," snapped Gwendolyn. "At least you admit you're a lunatic. Hildegard lives in the clouds. Oh, I love her dearly. And she's a friend to the underground, I'd be the last to deny it. That's why I agreed to carry out this mission for her. I owe her plenty of favors the whole movement does, for that matter. But she's still nuts! She claims to correspond with God!"
"Oh, but she does!" exclaimed Wolfgang. "Has a whole room in the Abbey just to store the Old Geister's stone tablets. Absolutely compulsive, that woman. Won't throw away anything. I'd certainly throw away God's stone tablets, if He sent me the kind of nasty notes He sends her!" He shook his head. "But she keeps right on with her correspondence. Says it's her bounden duty as a pious Abbess to tell God the plain and simple truth about Himself, even if He doesn't want to hear it. Which He certainly doesn't! The Deity doesn't take well to criticism, you know, and my aunt has quite the sharp tongue."