Who said "I'm still learning what it means to be a hero every day."?

This quote is attributed to Supergirl.

I'm still learning what it means to be a hero every day. - Supergirl

"I'm still learning what it means to be a hero every day."

Supergirl Education

"I'm not just Kara Danvers. I'm also Supergirl."

"Being a hero isn't just about having powers. It's about what you choose to do with them."

"I have to believe that there's good in people, even when they give me reason not to."

"My family is what makes me strong."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."