The original meaning of the word 'syzygy' (pronounced 'SIS-uhjee') is that of 'a pair of oxen yoked together'. The word 'syzygy' itself comes to us from the Greeks, and in addition to its literal meaning it meant either marital or sexual union. Further figurative use of the word is found among certain Gnostics, who used the concept to express their own dualistic ideas. Their Aions, for instance, were male and female deities combined in one—hermaphroditic deities called Syzygies. Here, however, the term 'syzygy' is used to denote the general concept of "a pair of opposites, united in their opposition". A syzygy, in other words, is equivalent to a complementarity. What is more, a special complementarity—the Syzygy of Self and Other—is here taken to be the ontic equivalent of the materialistic Void, the "ground state of the Universe" that early physicists also called the Vacuum. This fundamental "nothingness" of Physics turns out to be an infinitely powerful field of virtual energy. And the Syzygy, in its fullest (dynamical) sense, is the philosophic counterpart of this physical concept—the metaphysical analog of the physical ground of the Universe. Unfortunately, that's about all we can know about the Syzygy, due to its profoundly primordial role. Even though it is equivalent to the ground of existence (in particular, the ground of our personal existence), it is ultimately so far removed from our own personal experience as to be virtually beyond conception. Of course, this does not rule out altogether our knowing it, since—as it is real and it is our foundation—this "ground" is perhaps accessible through something like Gnosis/Bodhi/Intuition/ Meditation/LSD/etc. These, however, are private pathways to knowledge, and the personal experiences we have along these paths are not objective and communicable. The best we can do for our rational, objective understanding is to give analogies that we can understand, analogies that exemplify the structure that the Syzygy must posess in order to serve as an ontological foundation of the Cosmos and its physical components.