George H. Daniels Jr.'s 1964 article "Knowledge and Faith in the Thought of Cornelius Agrippa" (Bibliothèque d'Humanisme et Renaissance, vol. 26, no. 2, pp. 326–340) is one of the most important early contributions to the serious philosophical interpretation of Agrippa's work. Published at a moment when the scholarly literature on Agrippa was still dominated by source-hunting, influence-tracing, and the debate about whether the DOP and De incertitudine could possibly have been written by the same person, Daniels's article proposed a solution that has structured the scholarly debate ever since. The two works, he argued, are not contradictory but complementary expressions of the same underlying epistemological commitment: a fideist trust in revealed knowledge and a principled distrust of unaided human reason that belongs to the tradition of Renaissance Paulinism.

The Puzzle: DOP and De incertitudine

The apparent contradiction between Agrippa's two major works was the central puzzle of early Agrippa scholarship. The De occulta philosophia libri tres (written ca. 1510, published 1531–1533) is a massive, systematic compendium of occult knowledge spanning more than 700 pages in the Perrone Compagni critical edition. It presents natural magic, celestial magic, and ceremonial magic as legitimate forms of knowledge and practice, grounded in a rigorous three-world cosmology derived from Neoplatonic sources and developed in comprehensive detail across hundreds of chapters. Whatever its individual claims, the work's overall project is unmistakably affirmative: occult knowledge is real, accessible, and powerful, and the magician who masters it can work genuine effects in the world.

The De incertitudine et vanitate scientiarum atque artium (written ca. 1526, published 1530) is an equally comprehensive work that takes as its subject the vanity and uncertainty of all human learning. Working through the arts and sciences systematically — grammar, rhetoric, logic, arithmetic, music, geometry, astronomy, natural philosophy, medicine, law, theology, magic, alchemy, and dozens of other disciplines — Agrippa argues in each case that the discipline is corrupt, uncertain, dangerous, or futile. The chapter on magic in De incertitudine is particularly sharp: Agrippa there attacks the pretensions of the magicians with arguments that seem to strike directly at the foundations of the DOP.

The standard explanations for this apparent contradiction were: a genuine change of mind (Agrippa composed the DOP in his enthusiastic youth and repented in his mature sobriety); hypocrisy or opportunism (he published both in quick succession because both sold); tactical positioning (the De incertitudine attacks were cover for the controversial DOP); or genre difference (the De incertitudine is a declamation whose arguments do not represent sincere belief). Each of these explanations has some merit, but Daniels argued that none of them identified the underlying unity that would make both works consistent expressions of the same intellectual project.

The Fideist Solution

Daniels's solution is to identify both works as expressions of the same underlying epistemology: a form of Christian fideism — trust in revealed divine knowledge over unaided human reason — that belongs to a specific strand of Renaissance theology running from the Pauline letters through Erasmus and the reform movement. The key text is Paul's first letter to the Corinthians, chapter 1–3: "the wisdom of this world is foolishness with God," "I determined not to know any thing among you, save Jesus Christ, and him crucified," "the foolishness of God is wiser than men." This Pauline critique of worldly wisdom — the claim that human philosophical learning, however sophisticated, is a kind of hubris that mistakes its own competence — runs through the Christian tradition from the desert fathers through medieval mysticism and into the Erasmian programme of the philosophia Christi.

Daniels argues that Agrippa is a participant in this tradition. His scepticism in De incertitudine is not a nihilist rejection of all knowledge but a specifically targeted attack on the pretensions of scholastic academic learning — Aristotelian natural philosophy, Galenic medicine, legal formalism, scholastic theology — to provide secure foundations for truth. These disciplines claim more certainty than they possess; their practitioners confuse the elaborate machinery of syllogistic and commentary with genuine understanding; and their institutional authority makes them resistant to the kind of direct experiential and scriptural correction that genuine knowledge requires.

Against this false academic security, Daniels identifies two epistemological alternatives in Agrippa's thought. The first is the experiential, practical knowledge of the magician: not the scholastic magician who argues from authorities, but the practitioner who actually engages with the powers of nature and learns from direct experience what those powers can do. The DOP's magical knowledge is not the same kind of knowledge as Galenic medicine or Aristotelian physics; it is a knowledge grounded in observation, practice, and the long tradition of experienced practitioners — a kind of empirical knowledge avant la lettre, in Daniels's reading. The second alternative is revealed knowledge: the scriptures, the authentic patristic tradition, the direct illumination of the holy spirit. This is the only knowledge that Agrippa treats as genuinely secure, because it does not depend on unaided human reason but on divine grace.

Agrippa's Cosmological Sources

Daniels also addresses the cosmological framework of the DOP, arguing that the three-world hierarchy — elemental (natural magic), celestial (mathematical magic), and intellectual (ceremonial and Kabbalistic magic) — is drawn primarily from the Neoplatonic tradition as mediated through Ficino's De vita and Pico's Conclusiones rather than representing any original synthesis. This is a significant historiographical claim: it situates Agrippa as a systematizer and popularizer of ideas developed by more original thinkers rather than as an originator in his own right.

Daniels is careful not to make this a dismissive judgment. The originality of the DOP, he argues, lies not in the cosmological framework (which is broadly Ficinian) but in the systematic linking of that framework to a comprehensive programme of practical magical operations. Ficino had the theory; Agrippa had the ambition to build the practical manual on it. The encyclopedic sweep of the DOP — its hundreds of specific recipes, correspondences, characters, and procedures — represents a genuine intellectual achievement even if the theoretical foundation is borrowed.

Influence on Subsequent Scholarship

Daniels's article has been foundational for all subsequent work on the relationship between the DOP and De incertitudine. Lehrich (2003) adopts and extends the key move — arguing that the two works are philosophically continuous — while adding the specifically semiotic dimension that Daniels leaves undeveloped. For Lehrich, the continuity is not merely epistemological (both works distrust unaided human reason) but structural (the De incertitudine's scepticism is entailed by the semiotic premises of the DOP itself). This is a more sophisticated version of Daniels's claim, and Lehrich acknowledges the debt.

Van der Poel (1997) draws on Daniels for the Pauline-theological framework while redirecting the argument toward the rhetorical-generic dimension: the declamatory form of De incertitudine is for Van der Poel the primary explanation, with the theological content as its vehicle rather than its substance. Miles (2008) develops the rhetorical analysis further, showing how the retraction in DOP III follows classical rhetorical conventions of occupatio. All three later scholars are responding, directly or indirectly, to the problem Daniels first formulated: the need for an account of Agrippa's intellectual unity that makes both works consistent without denying the genuine differences between them.

As one of the first English-language articles to approach Agrippa as a serious philosophical figure deserving systematic intellectual analysis — rather than a historical curiosity or a catalogue of sources — Daniels's 1964 article represents a methodological threshold in Agrippa scholarship. The questions it asked — what is the underlying logic of Agrippa's thought? what problem is he trying to solve? how are his apparently contradictory commitments related? — are the questions that have driven the best subsequent scholarship in the field.