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Don Quixote is one of the most famous characters in literature. His name has become a word, quixotic, that means to do something foolishly impractical for the sake of a high ideal. Equally famous is his companion Sancho Panza. As Don Quixote wanders Spain thinking of himself as a storybook knight-errant, Sancho takes the role of the knight's loyal squire. Don Quixote is idealistic and intelligent, but crazy, because he is living in the everyday world but believing it is the world of romances. He is too old and weak to be a knight-errant, but he doesn't think so. Sancho has solid common sense and sees everyday reality clearly, but he is ignorant and willing to lie. He knows it is useless to try to reason with madmen and so he plays along, hoping to find a profit in it. Cervantes seems to wish we could mix the best qualities of this knight and squire in ourselves; then we would see our everyday selves as we truly are and still strive to be nobler and better.