The symbol which has become known as the Sigil of Lucifer is from a cluster of symbols found in the Grimorium Verum (Latin for “Grimoire of Truth”) which are supposed to be used in the calling forth of "Lucifer" (literally "Light Bringer" in Latin,) the archetype of discovering hidden knowledge and approached as an entity in the context. This sigil is believed to have most likely derived from a magic square, the origins of which are now lost. Other than this, very little has been written describing the meaning of the various components of this Sigil. Here I will share the various insights that I have personally gained over the years through contemplation. You may have your own insights and you are encouraged to explore these symbols further on your own.

This is fascinating: https://steemit.com/occult/@jeremycrow/the-sigil-of-lucifer-an-exploration