Who said "My powers are a gift, and I won't waste them."?

This quote is attributed to Supergirl.

My powers are a gift, and I won't waste them. - Supergirl

"My powers are a gift, and I won't waste them."

Supergirl

"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."