Who said "I was sent to Earth to learn what it means to be human."?

This quote is attributed to Superman.

I was sent to Earth to learn what it means to be human. - Superman

"I was sent to Earth to learn what it means to be human."

Superman Wisdom

"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."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."