For example, if you want to improve your health, you may want to know the cause of your health condition. And probably, you would find nutrition and exercise. But you may not like eating vegetables. You may not like doing exercise. Then, you would notice that the real cause of your lack of health comes from your unwillingness to eat vegetables and to do exercise.
Whenever you try to find the cause of some effect, you will find the deeper cause. Then, you will find the ultimate cause is always you. Because it is about your results and the cause of those results is always you. It means you need to change you to get preferable results for your life.
Somehow people miss this truth and try to change something else.