[1] These texts may vary widely in content and purpose, but by modern convention are usually subdivided into two main categories, the "technical" and "religio-philosophical" Hermetica.
The category of "technical" Hermetica encompasses a broad variety of treatises dealing with astrology, medicine and pharmacology, alchemy, and magic, the oldest of which were written in Greek and may go back as far as the second or third century BCE.
These are now all lost, except for a number of fragments (one of the larger of which is called Isis the Prophetess to Her Son Horus) preserved in later alchemical works dating to the second and third centuries CE.
[57] They regularly take the form of dialogues between Hermes Trismegistus and his disciples Tat, Asclepius, and Ammon, and mostly deal with philosophical anthropology, cosmology, and theology.
[58] The following is a list of all known works in this category: Undoubtedly the most famous among the religio-philosophical Hermetica is the Corpus Hermeticum, a selection of seventeen Greek treatises that was first compiled by Byzantine editors, and translated into Latin in the fifteenth century by Marsilio Ficino (1433–1499) and Lodovico Lazzarelli (1447–1500).
[63] This translation provided a seminal impetus in the development of Renaissance thought and culture, having a profound impact on the flourishing of alchemy and magic in early modern Europe, as well as influencing philosophers such as Ficino's student Pico della Mirandola (1463–1494), Giordano Bruno (1548–1600), Francesco Patrizi (1529–1597), Robert Fludd (1574–1637), and many others.
[68] In fifth-century Macedonia, Joannes Stobaeus or "John of Stobi" compiled a huge Anthology of Greek poetical, rhetorical, historical, and philosophical literature in order to educate his son Septimius.
[73] They consist of some fragments from the Asclepius (VI,8; mainly preserved in Latin, see above), The Prayer of Thanksgiving (VI,7) with an accompanying scribal note (VI,7a), and an important new text called The Discourse on the Eighth and Ninth (VI,6).
[77] Written in Arabic and probably dating from the twelfth century, the Kitāb fi zajr al-nafs ("The Book of the Rebuke of the Soul") is one of the few later Hermetic treatises belonging to the category of religio-philosophical writings.
[82] Other authors made similar criticisms of the Hermetica, largely as a means of undermining various religious and esoteric movements of the time that drew inspiration from them.
Richard Reitzenstein first argued that the Hermetica were a product of a coherent religious community whose ideas derived from Egyptian religion, although in later years he thought Hermetic beliefs were largely Iranian in origin, a position that received little support.
[84] Scholars in the middle of the century, such as Arthur Darby Nock, C. H. Dodd, and most influentially André-Jean Festugière, argued that the intellectual background of the Hermetica was overwhelmingly Greek, with possible influences from Iranian religions and Judaism, but little connection with authentic Egyptian beliefs.
[91] Soon afterward, Garth Fowden argued that the philosophical and technical Hermetica were distinct but interdependent, and that both were products of complex interactions between Greek and Egyptian culture.
[92] Richard Jasnow and Karl-Theodor Zauzich have identified fragments of a Demotic (late Egyptian) text that contains substantial sections of a dialogue between Thoth and a disciple, written in a format similar to the Hermetica.
[93][94] Christian Bull argued in 2018 that the Hermetica were in fact written by Egyptian priests in late Ptolemaic and Roman times who presented their traditions to Greek-speaking audiences in Greek philosophical terms.