Who said "Mistakes don't define you, how you handle them does."?

This quote is attributed to Supergirl.

Mistakes don't define you, how you handle them does. - Supergirl

"Mistakes don't define you, how you handle them does."

Supergirl Perseverance

"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."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."