I believe I have a sunny disposition, and am not naturally a grouch. It takes a lot of optimism, after all, to be a traveler.
Paul Theroux (2001). “Fresh Air Fiend: Travel Writings”, p.52, Houghton Mifflin Harcourt

I believe I have a sunny disposition, and am not naturally a grouch. It takes a lot of optimism, after all, to be a traveler.