This uplifting ballad was originally from Mitch Leigh's 1965 musical Man From La Mancha . Alternatively known as The Quest it has become a popular hit as a stand alone song inspiring numerous cover versions. Notable performances of the song include such artists as Diana Ross and The Supremes, Andy Williams, Elvis Presley, Frank Sinatra, The Temptations, Roberta Flack, Shirley Bassey, The Carpenters, Susan Boyle and many more. The Impossible Dream by musicroom / SATB