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The Bornless Ritual, also known as the Preliminary Invocation of the Goetia, or the Invocation of the Heart Girt with a Serpent, is often considered the proper preliminary invocation to the Ars Goetia since it was introduced as such by Aleister Crowley. Originally, grimoire magick did not include this particular ritual but routinely advised the magician (or "exorcist") to have a close bond to the heavenly powers before meddling with demons (e.g. the Book of Abramelin, the Keys of Solomon, etc.). As Stephen Skinner says, "The Bornless One" is nowhere mentioned, for instance, in his recent translation of the Goetia of Dr. Rudd, as the ritual is of Greaco/Egyptian origin. Skinner argues that the ritual is in fact an exorcism. 
"I summon you Headless One, who created earth and heaven, who created night and day [...] I am the Favor of the Aion; my name is a heart encircled by a serpent" 
- Sumner, Alex (2004). "The Bornless Ritual". Journal of the Western Mystery Tradition. 1 (7).
- PGM V. 96-172: Stele of Jeu the Hieroglyphist in his letter:
- Hans Dieter Betz, The Greek Magical Papyri in Translation, 1992. P. 103).