You will give the people of Earth an ideal to strive towards. They will race behind you, they will stumble, they will fall. But in time, they will join you in the sun, Kal. In time, you will help them accomplish wonders - Man Of Steel (2013)
“This character matters so much to so many people. I want to get that right. I want to do it justice. I want people to believe in the character and have faith in the character and kids to grow up wanting to be Superman. Or, God forbid, there’s people who are going through hardship and wishing that this character would turn up and save them.” - Henry Cavill
MoS: Humanity is worth saving and should be able to live out their life. Krypton had their chance and now it’s time to let humans have theirs.
BvS: There’s still light in the world. Through all the hate and crime, there are still people out there trying to do the right thing and in times of need we rally together. (Bruce Wayne’s restored faith in humanity after being inspired by Superman’s sacrifice.)
WW: Humanity isn’t perfect but they are capable of great things and should be able to forge their own path.
That’s what this symbol means. The symbol of the House of El means hope.
Embodied within that hope is the fundamental belief in the potential of every person to be a force for good. That’s what you can bring them.