“What giants?” said Sancho Panza.

“Those you see there,” answered his master, “with the long arms, and some have them nearly two leagues long.”

“Look, your worship,” said Sancho. “What we see there are not giants but windmills, and what seem to be their arms are the vanes that turn by the wind and make the millstone go.”

“It is easy to see,” replied Don Quixote, “that you are not used to this business of adventures.”

— Miguel de Cervantes, Don Quixote, 1605