““We acknowledge the truth of the following considerations: There exists no colour, nor sound, nor odour in the objective world, but there are the vibrations of ether, or the undulations of the air, or the stimuli of the sensory nerves of smell. Colour is nothing but the translation of the stimuli into sensation by the optical nerves, so also sounds by the auditory, and odours by the smelling. Therefore nothing exists objectively exactly as it is perceived by the senses, but all are subjective. Take electricity, for example, it appears as light when perceived through the eye; it appears as sound when perceived through the ear; it appears as taste when perceived through the tongue; but electricity in reality is not light, nor sound, nor taste.””