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.

Shel Silverstein (1930-1999) American poet, singer-songwriter, cartoonist, children's author
“Listen To The Mustn’ts,” Where the Sidewalk Ends (1974)