2. Human Duality
If we are to consider these systems in their completeness, in order to have in our external method of observation a foundation for the occult method, let us begin by holding to that system which must, at the very outset, obviously be for everyone the central system of the entire human organism, namely, the blood-and-heart system. Let us, moreover, keep in mind that after the stale blood has been freshened in the lungs, transformed from blue blood into red blood, it returns once more to the heart and then goes out again from the heart as red blood, to be used in the organism. Notice, that everything which I intend to draw will be in mere outline, so that we shall be dealing only with sketches.
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