I got an "A" in a college course because I could explain Environmentalism using his book "The Lorax" "I speak for the trees!"
I used to use the "Sneetches" story when teaching my students about discrimination, "They have stars on thars!" or "Horton Hatches and Egg" on responsibility and keeping your word. "I said what I mean and I mean what I said. An Elephant is faithful 100%"
One of my favorites is a little known story that shows the stupidity of war, "The Butter Battle" "Who's going to drop it? Will you...? Or Will he..?"Be patient," said Grandpa. "We'll see. We will see....