“Whenever you are afraid, it is a sure sign that you have allowed your mind to miscreate; that is, you have not allowed me to guide it. It is pointless to believe that controlling the outcome of misthought can result in real healing. When you are fearful, you have willed wrongly. This is why you feel you are responsible for it. You must change your mind, not your behavior, and this is a matter of will. You do not need guidance except at the mind level. Correction belongs only at the level where causation is possible. The term does not really mean anything at the symptom level, where it cannot work.” (ACIM, COA ed., T-2.IX.4:1-8)
Jesus knows that we have not given up fear, that we still have misthought, and we feel the results, in pain often. He emphasizes that a change of mind is far more important, and pivotal, than a change in behavior. A change in behavior will happen when we have changed our mind, then and only then.
He wants us to correct our thinking, and then we will see an improvement in our behavior. It seems that he is not so much concerned with the outcome of misthought as he is with the problem of the mind itself. He wants us to think aright.
A Course of Love, channeled later, emphasizes that we change our mind when we listen to our heart—a heart that has always known what to think, say, and do. Our heart does not need any teaching, but our mind, so long egoic, has still patterns of the ego lingering. And so we need a sounder basis for making decisions, and that sounder basis is our heart.
Everyone knows what the heart means without a tedious telling. Our heart will inform our mind, which will inform our behavior. Then we will really be healed.