From A Course In Miracles: This course makes no attempt to teach what cannot easily be learned. Its scope does not exceed your own. Except to say that what is yours will come to you when you are ready. Here are the means and purpose separate, because they were so made and so perceived. And therefore do we deal with them as if they were. It is essential it be kept in mind that ALL perception still is upside down, until its PURPOSE has been understood. Perception does not SEEM to be a means. And it is this that makes it hard to grasp the whole extent to which it MUST depend on what you use it FOR.
Perception seems to TEACH you what you see. Yet it but witnesses to what YOU taught. It is the outward picture of a wish, an image that you WANTED to be true. Look at yourself, and you will see a body. Look at this body in a different light, and it looks different. And without a light, it seems that it is gone. Yet you are reassured that it is there, because you still can feel it with your hands, and hear it move.
Here is an image that you WANT to be yourself. It is the means to make your wish come true. It GIVES the eyes with which you look on it, the hands that feel it, and the ears with which you listen to the sounds it makes. IT PROVES ITS OWN REALITY TO YOU. Thus is the body made a THEORY of yourself, with NO provisions made for evidence BEYOND itself, and NO escape within its sight. Its course is sure, when seen through its own eyes. It grows and withers, flourishes and dies. And you cannot conceive of you APART from it. You brand it sinful, and you hate its acts, judging it evil. Yet your specialness whispers, “Here is my own beloved son, with whom I am well pleased.”