The Sufi therefore practices that process through which he is able to touch that part of life in himself which is not subject to death. And by finding that part of life he naturally gets the feeling of certitude of life. It makes him more certain of life than of anything in the world. Because he sees in all things changeability and limitation. For everything that is composed is subject to be decomposed: everything born is subject to death. But he finds in finding that life that was his self, and that was the real life, and all else that he knows about life that begins to lose its importance.