"You are very wise to say so, dear. I'm glad that I have my blessings and miracles to do a little bit of good whenever I can. It's just that after having my hands tied for so long by my superiors, I do wish sometimes that I could do more. But I doubt I'm alone in feeling that way."

Besides, everything seems to have resolved itself. Molly is no longer a cat, but apparently this mysterious Frumpkin is! He looks all about, eager to see Caleb's familiar, and sure enough, he does eventually spot him up on the balcony.

"Hello!" he says cheerfully to the furry feline. "Well, aren't you a darling. Would you like to come down and join us?" He even joins in a little on the pspspses before returning his gaze to Molly. "Caleb has him keep you company, then? That's very thoughtful of him. He must like cats a great deal."

Aziraphale is starting to understand why Molly did not particularly mind being turned into a cat. Or why he might have potentially voiced a wish that lead to that specific curse.