Candc: I remember that song from years ago. It's from the musical "The Man of Le Mancha" which was based on a novel by Miguel de Cervantes Saavedra fully titled: "The Ingenious Gentleman Don Quixote of La Mancha".
https://en.wikipedia.org/wiki/Don_Quixote

The word quixotic comes from this title and is defined in the dictionary as: Adjective; not sensible about practical matters; idealistic and unrealistic.

Quixoti believed in the ideas of decency, chivalry and justice. To this end he went out to right the wrongs he saw and ended up going insane.

It is hard to live on the ideal plane when so much around us is being tilted in favor of one philosophy over another, or worse one ideology over another. I used to dream and hope for the best but find my ideal plane never existed and whatever hope I once strived for has vanished. Now I only wait upon my return to the earth. I hope you are young and can keep up that search for the "Impossible Dream". Perhaps when you find it you can tell the world the path you took. Regards, M Poirot