The extraordinary value, for explanation and prevision, of those mathematical and mechanical modes of conception which science uses, was a result that could not possibly have been expected in advance. Weight, movement, velocity, direction, position, what thin, pallid, uninteresting ideas! How could the richer animistic aspects of Nature, the peculiarities and oddities that make phenomena picturesquely striking or expressive, fail to have been first singled out and followed by philosophy as the more promising avenue to the knowledge of Nature’s life?