It's important to take care of your health.
Bob's doctor has told him it's important that he reduce his sugar intake.
Bob wants to have a snack before dinner.
Bob decides to have a healthy low sugar snack that day.
Bob eats a whole box of cupcakes that is much too big for one serving.
Bob changes his eating habits and gradually his health improves.
Bob reinforces his bad eating habits and his health deteriorates.