Who said "You can't control what happens, only how you react."?

This quote is attributed to Kenny McCormick.

You can't control what happens, only how you react. - Kenny McCormick

"You can't control what happens, only how you react."

Kenny McCormick Life

"Mmph mmph mrmph!"

"I'm not fat, I'm just big boned"

"Dude, we're in third grade"

"This is so cool"

"Life is meant to be lived with passion."

"Life is what happens when you're busy making other plans."

"Life is a journey, not a destination."

"Life's too short for regrets."