“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.”

“Let the reader find that he cannot afford to omit any line of your writing because you you have omitted every word that he can spare.”

“I served with General Washington in die Legislature of Virginia...and...with Doctor Franklin in Congress. I never heard neither of them speak ten minutes at a time, nor to any but the main point.”

“All pleasantry should be short; and it might even be as well were the serious short also.”