The idiom "love is blind" means that love can make people overlook physical appearance, flaws and shortcomings in another person. While the first clear written instance of the phrase is found in Geoffrey Chaucer’s The Canterbury Tales — "For love is blind and may not see." — the saying was popularized by William Shakespeare in The Merchant of Venice: "I am sure, if he be not he, he is a love, and love is blind."
