Of Oracles and Magical Agreements and Enchantments
Perrone Compagni — Table of Comparison
1533 edition (2:26): W, 2: 33 (second half) + a substantial addition at the end
This chapter, stellis respondent (“Of Oracles and Magical Agreements and Enchantments”), occupies a significant place in Agrippa's systematic exposition of occult philosophy. In the 1533 Cologne printed edition (De occulta philosophia libri tres, sigla K in Perrone Compagni's critical apparatus), the text represents Agrippa's mature formulation of the ideas it addresses, the product of over two decades of reading, travel, and revision since the composition of the Würzburg draft.
Based on W 2:33 of the Würzburg draft, this chapter was significantly augmented. Perrone Compagni identifies one or more substantial additions, indicating that Agrippa supplemented the original argument with new material, possibly drawn from sources encountered after the 1510 composition.
The extent of revision in this chapter illustrates the dynamic character of Agrippa's rewriting process. Rather than simply updating facts, he appears to have substantially reconfigured the argument. Comparison with the partial edition A — which represents an intermediate stage — may reveal whether the additions were introduced gradually or in a single later revision.
Agrippa's Argument
The chapter states the operative principle of musical magic: 'no songs, sounds, or musical instruments are more powerful for moving the emotions and inducing magical impressions than those composed from numbers, measures, and proportions after the fashion of the celestial.' Mathematical composition is the key — music works magically not through emotional expressiveness but through the precision of its proportional correspondence to celestial harmonics. Agrippa grounds this in the quadrivial tradition (arithmetic, music as applied arithmetic, geometry, astronomy) that links musical proportion to celestial proportion. His argument explains why Book II's mathematical programme extends to music: the magic squares of the planets and the harmonic proportions of celestial music are different expressions of the same underlying numerical order, and the practitioner who understands one understands both.
Scholarly Perspectives
Schipperges (2001) situates De occulta philosophia II.26 at the center of a longstanding historiographical debate about whether Agrippa's natural magic constitutes a coherent philosophical system or a collection of opportunistic borrowings. The chapter's core claim — that no songs, sounds, or musical instruments are more powerful for moving the emotions and inducing magical impressions than those composed from numbers, measures, and proportions after the fashion of the celestial — is, for Schipperges, not merely an assertion of musical efficacy but a programmatic statement grounding that efficacy in the quadrivial tradition of musica mundana. Crucially, Schipperges uses II.26 to resolve the longstanding interpretive puzzle of how to reconcile the confident natural-magical program of De occulta philosophia with the apparent scepticism of De incertitudine chapter 17. Rather than reading De incertitudine as a recantation, Schipperges argues that its negative catalogue is a deliberate paradoxical inversion of the mathematical-cosmological ground laid out in II.26 — the sceptical text presupposes and depends upon the positive framework it appears to undercut. If Schipperges is correct, II.26 is not a local chapter on musical talismans but a structural node connecting Agrippa's cosmology, his mathematics of celestial proportion, and his theory of emotional influence into a single, if deliberately tensioned, philosophical architecture.