Lecture I

Let us now consider this task more concretely. Amongst all the relationships which man has to the external world, the most important of all is breathing. We begin breathing at the very moment we enter the physical world. Breathing in the mother-body is still, if I may put it so, a preparatory breathing: it does not yet bring the being into a complete connection with the external world. The child only begins to breathe in the right sense of the word when he has left the mother-body. Now this breathing signifies a very great deal for the human being, for in this breathing there dwells already the whole threefold system of physical man. You know that amongst the members of the threefold physical human system we reckon, in the first place, the digestion and metabolism. But the metabolism, the assimilation, is intimately connected at one end with the breathing. The breathing process is connected with the blood circulation through metabolism. The blood circulation receives into the human body the substances of the external world which are introduced by another path, so that on the one hand the breathing is connected with the whole metabolic system or digestive system.