That's what "You are what you consume" is all about. Making the right decisions. Doing the right things. And staying consistent.
I see lots of other entries interpreting it as "You instantly change your whole identity when something happens". But that's not what change is. Change needs time and consistency.
I think this game isn't about trying to change though. It's about a fellow who tries to stay healthy. And with every unhealthy food he eats he slowly becomes more unhealthy himself until he dies.