Nonsense wakes up the brain cells. And it helps develop a sense of humor, which is awfully important in this day and age. Humor has a tremendous place in this sordid world. It's more than just a matter of laughing. If you can see things out of whack, then you can see how things can be in whack.
As quoted in "Author Isn't Just a Cat in the Hat" by Miles Corwin in The Los Angeles Times (27 November 1983); also in Dr. Seuss: American Icon (2004) by Philip Nel, p. 38