Piano,Vocal,Voice - Digital Download SKU: A0.1404009 By Jim Nabors And Marilyn. By Joe Darion and Mitch Leigh. Arranged by Dave Gingras and John E. Dosher. Broadway,Film/TV,Jazz,Musical/Show. Score. 3 pages. DAVID LEE GINGRAS #987178. Published by DAVID LEE GINGRAS (A0.1404009). The Impossible Dream (The Quest) is a popular song composed by Mitch Leigh, with lyrics written by Joe Darion. The song is the most popular song from the 1965 Broadway musical Man of La Mancha and is also featured in the 1972 film of the same name starring Peter O'Toole. This version features a root-based chord blocking that John and I have used in a number of our arrangements. We added what we think are some pretty cool left-hand fills that we hope you will like! It's a pretty song and not too hard to play!