Who said "Fear is just a feeling, it doesn't have to control you."?

This quote is attributed to Supergirl.

Fear is just a feeling, it doesn't have to control you. - Supergirl

"Fear is just a feeling, it doesn't have to control you."

Supergirl Fear

"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."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."