Who said "I can't change the past, but I can try to shape the future."?

This quote is attributed to The Flash (DCEU).

I can't change the past, but I can try to shape the future. - The Flash (DCEU)

"I can't change the past, but I can try to shape the future."

The Flash (DCEU) Change

"I'm fast. Really fast."

"Time moves differently when you're moving at super speed."

"You gotta embrace what makes you different."

"Running away isn't always the answer, even when you're fast enough to do it."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."