Excerpt: "In the well-known musical Man of La Mancha, Don Quixote sets off as a knight-errant on a quest to right the world's wrongs and to fight for the truth no matter the cost. He is joined, of course, by Sancho Panza, who believes that he will profit from sharing the spoils of their adventures. Jousting at windmills and challenging passersby as evil knights to be dealt with, however, Quixote comes across as a poor fool who is out of touch with reality. His image has even been stamped indelibly upon the English language in the form of an adjective: "quixotic;' which implies the foolhardy pursuit of lofty ideals."
Anderson, Paul N., "When Tempted by Sanity..." (1992). Faculty Publications - College of Christian Studies. 316.