5. Love, Intuition and the Human Ego

This loss of weight in a fluid is an old piece of knowledge. You know, of course, that it has been ascribed to Archimedes. He was bathing one day and noticed, on lifting his leg out of the water, how much heavier it was than when in the water, and exclaimed: Eureka! I have found it. He had discovered that every body in a fluid loses in weight the weight of the fluid displaced. Thus, if you think of Archimedes in his bath, here his physical leg and here the same leg formed of water, then the physical leg is lighter in water by the amount that this water-leg weighs. It is lighter by just this amount. Likewise the weight of our brain in the cerebral fluid is reduced by the weight of a mass of cerebral fluid of the size of the physical brain. That is, it is reduced from 1,500 to 20 grammes. In physics this is called ‘upthrust’, and here the etheric acts. The astral, on the other hand, is stimulated—to begin with—by breathing, whereby the airy element enters the human organism and eventually reaches the head in an extremely attenuated state; in this distribution and organisation of the air the astral is active.