A series of initiations given to the Innermost Spirit in the superior worlds after his Human Soul passes through the trial and test required for each initiation.

"There are nine Initiations of Minor Mysteries and five important Initiations of Major Mysteries.  The Soul is the one who receives the initiations.  This is a very intimate matter; something that one must not go about speaking of, nor something that must be told to anyone. Indeed, all the initiations and degrees that many schools of the physical world confer have no value whatsoever in the Superior Worlds, because the masters of the White Lodge only recognize the legitimate initiations of the Soul as genuine.  These are completely internal. The disciple can ascend the nine Arcades, pass through all the nine Initiations of Minor Mysteries without having worked in the Arcanum A.Z.F. (Sexual Magic).  Nevertheless, it is impossible to enter the Major Mysteries without Sexual Magic (the Arcanum A.Z.F.) In Egypt, everyone who reached the Ninth Sphere would inevitably receive by word of mouth the terrific secret of the great Arcanum (the most powerful Arcanum, the Arcanum A.Z.F.). The First Initiation is related with the first Serpent, the Second Initiation with the second Serpent, the Third Initiation with the third Serpent, the Fourth Initiation with the fourth Serpent, the Fifth Initiation with the fifth Serpent (the Sixth and Seventh belong to Buddhi, or Soul Consciousness and to Atman, or the Innermost of the human being)." - Samael Aun Weor, The Perfect Matrimony