Hermetica appeared in the 2nd-century Gnostic library another famous tract is the Emerald Tablet, thought that these texts were remnants of an extensive literature
Parts of the Hermetica appeared in the 2nd-century Gnostic library found in Nag Hammadi. Other works in Syriac, Arabic, Coptic and other languages may also be termed Hermetica  another famous tract is the Emerald Tablet, which teaches the doctrine "as above, so below". For a long time, it was thought that these texts were remnants of an extensive literature, part of the syncretic cultural movement that also included the Neoplatonists of the Greco-Roman mysteries and late Orphic and Pythagorean literature and influenced Gnostic forms of the Abrahamic religions. 
