Khaled Hosseini said this quote

A creative writing teacher at San Jose State used to say about clichés: 'Avoid them like the plague.' Then he'd laugh at his own joke. The class laughed along with him, but I always thought clichés got a bum rap. Because, often, they're dead-on. But the aptness of the clichéd saying is overshadowed by the nature of the saying as a cliché.