If you're a Christian, remember that discipline is a fruit of the Spirit. The more disciplined you are, the easier your life will be. The less disciplined you are, the harder. It will take discipline to get yourself to the gym three days a week. It will take discipline to eat foods that are as nutritious as possible. It will also take a lot of discipline to take time off to give your body sufficient time to recover and grow. But when you do these things, your body will begin to change. You'll begin to look and feel, not just good, but great. It's not some miracle supplement that did this. You did it through discipline.