So once I settled on an image, my original quote didn’t work. I felt that Batman & Tinky Winky needed the counterbalance of a more serious quote.
Serves me right for being inclined to give text primacy over images. Here’s the quote I originally planned on:
"The teeth being harder than the tongue / Are the first to wear out."
(Again, giving primacy to words, and in this case speech).
The quote is from the Yuan Dao, by Liu An, shown here ascending to heaven accompanied by one of his dogs and a rooster, both of whom managed to ingest the dregs left over when he mixed an elixir of immortality.