[160] [cap.31] But now, dismissing the consideration of those of the outward senses which are in the stables, as it were, fattening up an animal which is born with us, namely, appetite, let us investigate the nature of that sense which receives speech, namely, hearing; the continued and vigorous, and most perfect course of which exists in the atmosphere which surrounds the earth, when the violence of the winds and the noise of thunder sound with a great dragging noise and terrible crash.