God's laws prevail both in Heaven and on Earth. There is a law, the law of cause and effect. I would say it is the basic law by which God is governed.
Cause comes from God. He is the Cause, and the Effect is His Son.
You cannot escape this law. Cause is Cause because the effect makes the cause a cause. Without cause, there is no effect. The problem arises when you mistake the effect for cause, when in fact it is only the effect. You must find the cause, which is always mental. You are thought, an idea of the Cause; you can never be the cause of the cause, you are always the effect in terms of Creation.
In this world, which is a parody of Creation, if you have causes in your mind that are responsible for undesirable situations occurring to you—we call these causes programs, wrong decisions, etc.—you have to undo the cause; you cannot do it on your own. The only one who can is Jesus; Mary can also do it if Jesus agrees.
An illness is not the cause; it's the effect that shows you there's a cause in your mind producing it. Doctors only alleviate and cure the effects; they can't get to the root cause. And this cause finds another symptom (another effect) that manifests in your body.
Undoing the cause is called Atonement. You can atone on your own or seek a teacher of God to find the cause that brings you these harmful effects.
The effect is always in the cause and never the other way around, although in this world you can confuse the effect with the cause, and it happens very often.
I used an illness as an example; it's just one example. There are other causes, such as: stagnation in life, poverty, lack of achievement, etc.
Remember cause and effect.