the.com/hermeticism

means A philosophical-mystical tradition built on the idea that hidden spiritual truths connect the divine, the cosmos, and the human soul, often expressed through alchemy, astrology, and secret wisdom literature.

from Named for Hermes Trismegistus — 'thrice-great Hermes' — a legendary sage blending the Greek god Hermes with the Egyptian god Thoth, both patrons of writing and hidden knowledge. The texts attributed to him, known as the Corpus Hermeticum, were long believed to be ancient Egyptian wisdom; they're actually thought to date from the early centuries CE, blending Greek philosophy, Egyptian religion, and Jewish and Christian ideas. The word 'hermetic' meaning 'sealed airtight' comes from the same source — alchemists believed Hermes himself invented a magical seal to keep vessels (and secrets) perfectly closed.