I hadn't time to sift through the entire movie to find an optimum clip; as a leitmotif, of course the passage gains force with repetition. Some better samples occur at 14:27-15:15 (one of the heroes recognizes a fellow resistance member, who leads him to a rebel hideout) and 20:09-21:16 (the hero in question learns that the comrade who held off the bad guy and saved his life died in the effort.)

It comes to fruition, waxing into a triumphal fanfare, at 1:27:01-end, as the three surviving heroes carry off their fallen and rebels rally from all quarters to join their cause.