Thus Goethe found himself led to ideas regarding the male and female principles in the plant, which were the exact opposite of those one obtains if, in trying to explain the process of pollination, one does not keep to the plant itself but imports an analogy from another kingdom of nature. For in continuance of the vertical principle of the plant, the pistil and carpel represent the male aspect in the process of spiritual anastomosis, and the mobile, wind- or insect-borne pollen, in continuing the spiral principle, represents the female part. If the process of pollination is what the plant tells us it is, then the question arises as to the reason for the occurrence of such a process in the life cycle of the fully developed plant. Goethe himself has not expressed himself explicitly on this subject. But his term 'spiritual anastomosis' shows that he had some definite idea about it. Let us picture in our mind what happens physically in the plant as a result of pollination and then try to read from this picture, as from a hieroglyph, what act of the spiritual principle in the plant comes to expression through it. Without pollination there is no ripening of the seed. Ripening means for the seed its acquisition of the power to bring forth a new and independent plant organism through which the species continues its existence within nature. In the life cycle of the plant this event takes place after the organism has reached its highest degree of physical perfection. When we now read these facts in the light of the knowledge that they are deeds of the activity of the type, we may describe them as follows: Stage by stage the type expends itself in ever more elaborate forms of appearance, until in the blossom a triumph of form over matter is reached. A mere continuation of this path could lead to nothing but a loss of all connexion between the plant's superphysical and physical component parts. Thus, to guarantee for the species its continuation in a new generation, the formative power of the type must find a way of linking itself anew to some part of the plant's materiality. This is achieved by the plant's abandoning the union between its two polar growth-principles and re-establishing it again, which in the majority of cases takes place even in such a way that the bearers of the two principles originate from two different organisms. By picturing the process in this way we are brought face to face with a rule of nature which, once we have recognized it, proves to hold sway at all levels of organic nature. In general terms it may be expressed as follows: In order that spiritual continuity may be maintained within the coming and going multitude of nature's creations, the physical stream must suffer discontinuity at certain intervals.