It will help our further descriptions if we introduce at this point the name which Rudolf Steiner adopted for the type of forces we are concerned with here. In view of the fact that their origin lies in the extra-terrestrial realm of the universe, he called them 'astral' forces, thereby giving back to this term, also, its true and original meaning. It is under this name that we shall speak of them henceforth. To make ourselves more familiar with the character of the astral forces, it will be well to observe them first of all in their macrotelluric form of activity.