 Porta’s magic is parasitically dependent on manipulating the affective structures of love and hatred that bind together the universe. The principle of universal affective correlations formed the backbone of Renaissance natural magic in general. Porta credits this doctrine to Empedocles (Magia 1558: bk.1, ch. 9), who held a reputation as a magus among Porta’s contemporaries (Kingsley 1995). These ideas were not only embraced by many of the preternatural philosophers, but were already found in the preface of the De mirabilibus mundi ascribed to Albertus, one of Porta’s favorite sources for many of his more unusual segreti.