Goethe confesses that at first he himself 'had credulously put up with the ruling dogma of sexuality'. He was first made aware of the invalidity of this analogy by Professor Schelver who, as Superintendent of the Jena Botanical Institute, was working under Goethe's direction and had trained himself in Goethe's method of observing plants. This man had come to see that if one held strictly to the Goethean practice of using nothing for the explanation of the plant but what one could read from the plant itself, one must not ascribe to it any sexual process. He was convinced that for a Goethean kind of biology it must be possible to find, even for the process of pollination, an idea derived from nothing but the two principles of plant life: growth and formation.