The Heremetic teachings come from a collection of writings (the “Corpus Hermetica”) attributed to Hermes Trismegistus — a figure connected to both the Greek god Hermes and the Egyptian god Thoth.
This collection is commonly dated between the 2nd and 3rd centuries CE, although it is possibly much older.
The Heremetic texts have similarities with ancient Egyptian wisdom dialogues, Platonic philosohpy, and the texts of the Christian Gnostics (fragments of Hermetic writings were even found in the Nag Hammadi library). These writings are deeply concerned with the spiritual potential of each person and the steps needed to reach enlightenment or divine wisdom.
Check out the posts below for practices drawn from the Hermetic texts.
Trismegistos is a public domain image found here