Line 35 seems like a strange thing to say, but I found something in Waite's
Book of Black Magic and of Pacts, 1898 which can partially explain it.
"Each of the occult sciences was, however, liable to that species of abuse which is technically but fantastically known as Black Magic. Astrology, or the appreciation of the celestial influences in their operation upon the nature and life of man, could be perverted in the composition of malefic talismans by means of those influences. Esoteric Medicine, which consisted in the application of occult forces to the healing of disease in man, and included a traditional knowledge of the medicinal properties resident in some substances disregarded by ordinary pharmacy, produced in its malpractice the secret science of poisoning and the destruction of health, reason or life by unseen forces. The transmutation of metals by Alchemy resulted in their sophistication. In like manner, Divination, or the processes by which lucidity was supposed to be induced, became debased into various forms of witchcraft and Ceremonial Magic into dealing with devils."
It seems that by "Witchcraft and the Black Sabbath" he means this debased form of divination. It doesn't really explain why this would be the case though.