Who said "Happiness isn't a destination; it's moments along the way."?

This quote is attributed to The Flash (DCEU).

Happiness isn't a destination; it's moments along the way. - The Flash (DCEU)

"Happiness isn't a destination; it's moments along the way."

The Flash (DCEU) Happiness

"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."

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."