Goethe held a lofty and comprehensive view of the significance of the male and female principles as spiritual opposites in the cosmos. Among the various manifestations of this polarity in earthly nature he found one, but one only, in the duality of the sexes as characteristic of man and animal. Nothing compelled him, therefore, to ascribe it in the same form to the plant. This enabled him to discover how the plant bore the same polarity in plant fashion.