Listen to the MUSTN'TS, child,
Listen to the DON'TS
Listen to the SHOULDN'TS
The IMPOSSIBLES, THE WON'TS
Listen to the NEVER HAVES
Then listen close to me --
Anything can happen, child,
ANYTHING can be.
Silverstein, S. (1974). Where the Sidewalk Ends. New York: HarperCollins.