Bullwinkle's Eyes, page 18

"It's easy," the nurse said. "Lesson Eleven."
"Lesson Eleven," the father said.
"Lesson Eleven, Paragraph Two, Axiom Seven: Once one dismisses the rest of all possible worlds..."
Then, in a high-pitched monotone, the other cartoon boy, the father's son, sang:

Then one, finds this is, the best of all possible worlds!

The two boys sang together:

Once one, dismisses, the rest of all possible worlds,
Then one, finds this is, the best of all possible worlds!*

"Whatever," the cartoon father said. He picked up the spoon and scooped up a mouthful of creamed corn.
STOP. REWIND. PLAY.