The spittle of a man fasting hath a manner strength of privy infection. For it grieveth and hurteth the blood of a beast, if it come into a bleeding wound, and is medlied with the blood. And that, peradventure, is, as saith Avicenna, by reason of rawness. For raw humour medlied with blood that hath perfect digestion, is contrary thereto in its quality, and disturbeth the temperance thereof, as authors say. And therefore it is that holy men tell that the spittle of a fasting man slayeth serpents and adders, and is venom to venomous beasts, as saith Basil. A discording voice and an inordinate troubleth the accord of many voices. But according voices sweet and ordinate, gladden and move to love, and show out the passions of the soul, and witness the strength and virtue of the spiritual members, and show pureness and good disposition of them, and relieve travail, and put off disease and sorrow. And make to be known the male and the female, and get and win praising, and change the affection of the hearers; as it is said in fables of one Orpheus, that pleased trees, woods, hills, and stones, with sweet melody of his voice. Also a fair voice is according and friendly to kind. And pleaseth not only men but also brute beasts, as it fareth in oxen that are excited to travail more by sweet song of the herd, than by strokes and pricks. Also by sweet songs of harmony and accord or music, sick men and frantic come oft to their wit again and health of body. Some men tell that Orpheus said, "Emperors pray me to feasts, to have liking of me; but I have liking of them which would bend their hearts from wrath to mildness, from sorrow to gladness, from covetousness to largeness, from dread to boldness." This is the ordinance of music, that is known above the sweetness of the soul. Now it is known by these foresaid things, how profitable is a merry voice and sweet. And contrariwise is of an unordinate voice and horrible, that gladdeth not, nother comforteth; but is noyful and discomforteth and grieveth the ears and the wit. Therefore Constantine saith that a philosopher was questioned, why an horrible man is more heavy than any burden or wit. And men say that he answered in this manner. An horrible man is burden to the soul and wit.