The Wizard of Oz by Lynam Frank Baum Chapter 16 Page 8

“How can I help being a humbug,” he said, “when all these people make me do things that everybody knows can't be done?

It was easy to make the Scarecrow and the Lion and the Woodman happy, because they imagined I could do anything. But it will take more than imagination to carry Dorothy back to Kansas, and I'm sure I don't know how it can be done.”