“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.”

“Four days will quickly steep themselves in nights; Four nights will quickly dream away the time; And then the moon, like to a silver bow new bent in heaven, shall behold the night of our solemnities.”

“Congratulate yourself if you have done something strange, extravagant and broken the monotony.”

“You will think me very pedantic, gentlemen, but holiday though it may be, I have not the smallest interest in any holiday, except as it celebrates real and not pretended joys.”