"The Impossible Dream (The Quest)" is a popular song composed by Mitch Leigh, with lyrics written by Joe Darion.
According to composer Mitch Lee in Soul Music - The Impossible Dream, BBC Radio 4, 2011, the original lyricist was WH Auden.
The complete song is first sung by Don Quixote as he stands vigil over his armor, in response to Aldonza (Dulcinea)'s question about what he means by "following the quest".
[1] During Robert F. Kennedy's long shot campaign for the presidency in 1968, Senator George McGovern introduced him before a South Dakota stump speech by quoting from "The Impossible Dream".
Javier was shot and killed in the plaza of San Jose, Antique, during the counting following the 1986 snap election, an act which contributed to the peaceful overthrow of Ferdinand Marcos by Cory Aquino in the People Power Revolution.