All-Star Superman is filled to the brim with wonderful tiny details. The way Quintum’s Kandorian chair is malformed by his weight in Chapter Ten. The way Zibarro’s costume in Chapter Seven looks like a modified Clark Kent suit. Bar-El glimpsed as the warden of the Phantom Zone in Chapter Eleven. The way the very last page illuminates a garbled comment from the Unknown Superman back in Chapter Two. But the big moment is the perfect line of dialogue. It comes in Chapter Ten, when Superman, without a second’s hesitation, takes time from his world-building feats to embrace and comfort a suicidal young girl. When he tells her, “You’re much stronger than you think you are,” they become the most moving words we have ever read in a Superman story. And they are perfect because they reveal, in one sentence, the fundamental secret of Superman and why we love him so:
Gods achieve their power by encouraging us to believe in them.
Superman achieves his power by believing in us."
Mark Waid, in the introduction to All-Star Superman, Volume 2
Happy 75th Anniversary, Superman