Magical Practice Required Specialist Knowledge
Magic was accepted without exception by all strata of society, but its practice required considerable specialist magical knowledge; amateur dabbling with such powers was generally disastrous. In the official rhetoric of these times magic is a powerful but ambiguous quality, sometimes practised by specialists or charismatic individuals, and also by priests and rabbis drawing on religious lore. Magic is intimately bound up with religion for the Greeks and Romans, somewhat more removed for Jews. It is by turns valued, contested, debated and deemed dangerous; it is a variable quality but still central to social and cultural forces, as well as being a good diagnostic of them. Magic is as important for the historian in the present as it was for contemporary people millennia ago, and in order to understand it we must briefly sketch out broader cultural traditions and histories, many of which also provide the foundations of the world in which we live today.
— Magic: A History, p. 240