If we wish to understand why the same dynamic action working on the physical and etheric organisms of the plant, on the one hand, and of man and the animal, on the other, brings about effects so different, we must turn to the realm whence this action originates in both cases. For the animal and for man this realm is situated within their organisms because in addition to their individual physical and etheric organizations they are endowed also with an individual organization of the higher kind. Not so with the plant. For the rhythms of its growth, the successive formation of its various organs, the production of its colours, etc., the plant depends on outer conditions.