Fight of the Giants

At this, they discovered thirty or forty windmills that there were in that field, and as soon as Don Quixote saw them, he said to his squire:

—Fortune is guiding our affairs better than we could have hoped; for you see over there, friend Sancho Panza, where there appear to be thirty or more monstrous giants, with whom I intend to do battle and strip them all of their lives, and with whose spoils we shall begin to enrich ourselves, for this is a good war, and it is a great service to God to rid the earth of so foul a brood.

—What giants? —asked Sancho Panza.

—Those you see over there —replied his master—, of the long-armed ones, some of whom have arms nearly two leagues long.

—Take care, your worship —answered Sancho—, for those things yonder are not giants but windmills, and what seem to be arms are the sails, which, being turned by the wind, make the millstone go.

Don Quixote of La Mancha