Gestalt Therapy Principle

One of my trainers in a Getalt Therapy program I was enrolled in said the following:
"People want to continue to do what they are doing and get different results. As long as they continue to do what they are doing, they will get the same results. To think otherwise is "magic".
One example that comes to mind is the "magical thinking," of those who continue overeating and expecting not to put on weight. Following the above insight: "As long as you continue to overeat, (over time), you will put on weight and get fat. To think otherwise, that you can eat however much you want and not put on weight, is "magical thinking." This principle applies to any other habit we may have.