Christian Science teaches that matter does not exist. Even if it does not explain it fully, nevertheless there is one life; and what we call matter and spirit are simply different aspects of it. We must realize that there is one life and that it is all spirit; even matter is a passing state of spirit. And spirit is intelligent; it is intelligence itself, besides being powerful and free from death and decay. It is capable of giving its life even to the dense substance which has been made out of itself, and which is matter. Therefore it is beyond words to tell to what an extent the thought, the feeling, and the attitude help one to become cured.