It is widely known that the Hymn to Selene from the PGM is referring to the Goddess Hekate. The invocation I am going to write derives from the PGM XII 238-245. It is an invocation to the almighty God, but I have modified it slightly to invoke the Goddess Hekate. The invocation is very beautiful, truely poetic. I have added the invocation to a well structured ritual, for anyone who wants to follow it or modify it according to its magickal tradition.