Who said "You have to believe in yourself when no one else does."?

This quote is attributed to The Flash.

You have to believe in yourself when no one else does. - The Flash

"You have to believe in yourself when no one else does."

The Flash Courage

"My name is Barry Allen, and I am the fastest man alive."

"You can't save everyone. Sometimes you have to let people go."

"I'm fighting so that no one else has to suffer like I did."

"Life doesn't give you second chances. So I'm making my own."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."