"Loudness depends on the quantity of the sound. Of the harmony of sounds I will hereafter speak. Colors are a flame which emanates from all bodies having particles corresponding to the sense of sight. Some of the particles are less and some greater, and some are equal to the parts of the sight. The equal particles are transparent, the larger contract, and the lesser dilate the sight; is produced by the dilatation, black by the contraction, of the particles of sight. There is also a swifter motion of another sort of fire which forces a way into the passages of the eyes, and elicits from them a union of fire and water which we call tears. The fires from without and within meet and are extinguished in the tear-drop, and all sorts of colors are generated in the mixture. This affection is termed by us dazzling, and is produced by a flash. There is yet another sort of fire which mingles with the moisture of the eye without flashing, and produces a color like blood—to this we give the name of red. Again, the bright element mingling with the red and white produces a color which we call auburn. The law of proportion, however, in which the several colors are formed, cannot be determined scientifically or even probably. Red, when mingled with black and white, gives a hue, which becomes when the colors are burnt and a greater portion of black is added. Flame-color is a mixture of auburn and dun; dun of white and black; pale of white and auburn. White and light meeting, and falling upon a full black, become dark ; dark blue mingling with white becomes a light blue; the union of flame-color and black makes leek-. There is no difficulty in seeing how other colors are probably composed. But he who should attempt to test the truth of this in fact, would forget the difference of the human and divine nature. God only is able to compound and resolve substances; such experiments are impossible to man."