The Hermetic tradition represents a non-Christian lineage of Hellenistic Gnosticism. The central texts of the tradition, the Corpus Hermeticum were lost to the West in classical times. Their rediscovery and translation during the late-fifteenth century by the Renaissance court of Cosimo de Medici, provided a seminal force in the development of Renaissance thought and culture. The fifteen tracts of the Corpus Hermeticum, along with the Perfect Sermon or Asclepius, are the foundation documents of the Hermetic tradition. The texts presented here are taken from the translation of G.R.S. Mead, Thrice Great Hermes: Studies in Hellenistic Theosophy and Gnosis, 3 Volumes.