Christmas Course VIII
We must be absolutely clear that if we want to enter the spiritual world, ideas and concepts are needed that are quite contrary to what is a matter of course in the physical world. Courage is required so that we shall not enter into the spiritual world in confusion. We must have courage enough to pass over the spiritual threshold, over the abyss. If we cross over to the spiritual world, if we pass the Guardian of the Threshold and reach the spiritual world yonder in the soul and spirit, in astral body and ego, consciously, then all is well. But if we do not pass through this experience in the ego and astral body, illusion arises and when this illusion shoots back upon the human being, illness is the result. Whenever a man is ill, he really has the Guardian of the Threshold within him, but in a kind of demonic counterpart.