Second Lecture

Other organs have been set upward, first during solar evolution, and then remodeled. That which we today call the human skull, the human head, was laid down during solar evolution and then remodeled many times. But if only the changes that the evolution of the sun has brought about in the human skull had taken place, then man would have to carry his head in a way that it cannot be carried, namely, so that it would always be directed upwards. Therefore, during the evolution of the earth through the influence of the sun, a ninety-degree turn has occurred, so that what should be directed upwards is now directed that way. Instead of thus drawing the solar arrow for the evolution of the earth, we must now draw it for the evolution of the earth (see illustration). It is part of the normal evolution that the human form has undergone under the influence of the cosmos that the shape of the head, having been directed upwards, has been directed forwards, turned towards the front.