Does everything that happens to us happen by chance? Or could our reactions to life’s events change their outcomes in small or large ways? (I've heard it said before that what might break one person may actually strengthen another, and although we cannot control outside events or circumstances, we can choose how we react.) These thought-provoking questions came to mind as I finished watching Sunday’s matinée performance of playwright Nick Payne’s Constellations, now playing at the Clinton Area Showboat Theatre.