Who said "I've learned that nobody is truly alone."?

This quote is attributed to Superman.

I've learned that nobody is truly alone. - Superman

"I've learned that nobody is truly alone."

Superman

"I'm here to fight for truth and justice, and all that stuff."

"It's not who I am underneath, but what I do that defines me."

"The world doesn't need a savior, but it could use a friend."

"Even in darkness, there is always hope."