"It is imagination that first taught man the moral meaning of color, of contour, of sound, and of scent. In the beginning of the world it created analogy and metaphor. What would be truly surprising would be to find that sound could not suggest colour, that colours could not evoke the idea of a melody, and that sound and colour were unsuitable for the translation of ideas, seeing that things have always found their expression through a system of reciprocal analogy."