Actually with a different context, it
was about Superman first, and about being selfish as Clark so far uses his powers for them alone, pa Kent coming to terms with them having had the gift of Clark to themselves on the farm, who should never belong to them alone, but to the world, and for the greater good.
Clark, because of these great powers, (lists all the powers) ...you have a great responsibility.
*Yeah, Pa Kent said it first, about Superman.
Stan Lee just later cleverly changed it, and applied it to his character who yeah would have first instinctualy used his powers selfishly, until he more tragically comes to terms with his actions, and uncles (same) words.
Yet are both about the realization of using the powers selfishly, then transitioning to the greater good and
responsibility that comes with them.