"Mm, I don't know about that . . . " Aziraphale brightened slightly, interested in the idea even though, yes, it was impossible, and that really wasn't them anymore. Still. "There's so much of life after childhood. And even if your childhood is wonderful, being an adult can be very unpleasant. It's all a game of chance, really, and a matter of experiencing everything that humans experience."

In other words: taking the good with the bad. Which would be the ultimate stumbling block, of course, because angels were not good at taking the good with the bad. Aziraphale sighed and finished his wine. They were all so . . . stubborn.