“The “three Heads”, superposed above each other, are evidently taken from the three mystic triangles of the Hindus, which also superpose each other. The highest “head” contains the Trinity in Chaos, out of which springs the manifested trinity. En-Soph, the unrevealed forever, who is boundless and unconditioned, cannot create, and therefore it seems to us a great error to attribute to him a “creative thought”, as is commonly done by the interpreters. In every cosmogony this supreme Essence is passive; if boundless, infinite, and unconditioned, it can have no thought nor idea. It acts not as the result of volition, but in obedience to its own nature, and according to the fatality of the law of which it is itself the embodiment. Thus, with the Hebrew kabalists, En-Soph is non-existent wˋa, for it is incomprehensible to our finite intellects, and therefore cannot exist to our minds.
Its first emanation was Sephira, the crown rtb. When the time for an active period had come, then was produced a natural expansion of this Divine essence from within outwardly, obedient to eternal and immutable law; and from this eternal and infinite light, (which to us is darkness), was emitted a spiritual substance. This was the First Sephiroth, containing in herself the other nine twryps Sephiroth, or intelligences. In their totality and unity, they represent the archetypal man, Adam Kadmon, the “prowtovgono”, who in his individuality or unity is yet dual, or bisexual, the Greek Didumos, for he is the prototype of all humanity.
Thus, we obtain three trinities, each contained in a “head”. In the first head, or face, (the three-faced Hindu Trimurti), we find Sephira, the first androgyne, at the apex of the upper triangle, emitting Hackama, or Wisdom, a masculine and active potency – also called Jah, xyÒ – and Binah, hnyb, or Intelligence, a female and passive potency, also represented by the name Jehovah xwxy. These three form the first trinity or “face” of the Sephiroth. This triad emanated Hesed, rsx, or Mercy, a masculine active potency, also called El, from which emanated Geburah wyr, or Justice, also called Eloha, a feminine passive potency; from the union of these two was produced Tiphereth trapt, Beauty, Clemency, the Spiritual Sun, known by the divine name Elohim; and that second triad, “face”, or “head”, was formed.
These emanating, in their turn, the masculine potency Netzah, hcn, Firmness, or Jehovah Sabaoth, who issued the feminine passive potency Hod, rwh, Splendor, or Elohim Sabaoth; the two produced Jesod, rwsy, Foundation, who is the mighty living one El-Chai, thus yielding the third trinity or “head”. The tenth Sephiroth is rather a duad and is represented on the diagrams as the lowest circle. It is Malchuth or Kingdom, twblm, and Shekinah hnybX, also called Adonai, and Cherubim among the angelic hosts. The first “Head” is called the Intellectual world; the second “Head” is the Sensuous, or the world of Perception, and the third is the Material or Physical world.
“Before he gave any shape to the universe”, says the Kabala, “before he produced any form, he was alone without any form and resemblance to anything else. Who, then, can comprehend him, how he was before the creation, since he was formless? Hence, it is forbidden to represent him by any form, similitude, or even by his sacred name, by a single letter, or a single point. …The Aged of the Aged, the Unknown of the Unknown, has a form, and yet no form. He has a form whereby the universe is preserved, and yet has no form, because he cannot be comprehended. When he first assumed a form, (in Sephira, his first emanation), he caused nine splendid lights to emanate from it.””
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 