(Hebrew אין סוף) Alternatively Ein Sof or Ayn Sof.
"AIN SOPH is the second aspect (of the Absolute); it is where a certain manifestation already exists... A divine Ray exists within the human being. That Ray wants to return back into its own Star that has always smiled upon it. The Star that guides our interior is a super divine Atom from the Abstract Absolute Space. The Kabbalistic name of that Atom is the sacred Ain Soph." —Samael Aun Weor, Tarot and Kabbalah