“Adults are only obsolete children.”

“Every once in a while, I get mad. 'The Lorax' came out of my being angry. The ecology books I'd read were dull... In 'The Lorax,' I was out to attack what I think are evil things and let the chips fall where they might.”

“Once-ler! You're making such smogulous smoke - my poor swomee swans, why they can't sing a note! No one can sing who has smog in his throat.”

“You ought to be thankful a hole heaping lot, for The places and people you're lucky you're not!”

“Plant a new Truffula. Treat it with care. Give it clean water. And feed it fresh air.”

“I say, without characters, fame lives long.”

“Let fame, that all hunt after in their lives,Live regist'red upon our brazen tombsAnd then grace us in the disgrace of death;When, spite of cormorant devouring Time,Th' endeavor of this present breath may buyThat honor which shall bate his scythe's keen edgeAnd make us heirs of all eternity.”

“He lives in fame that died in virtue's cause.”