In like manner Democritus expressed the doctrine of opposites, when he described Reality by the life of the atom, i.e., a movement of "that which is" (To on) within "that which is not" (To me on).
The original source of this doctrine however, is the philosophy of the Mystery System of Egypt where we find the male and female principles of nature symbolized by (a) Osiris and Isis: the Egyptian God and Goddess, and (b) the Gods Homs and Seth, symbolizing a world in static equilibrium of conflicting forces, as they contend for dominion over Egypt.
(Memphite Theology; Kingship and the Gods by Frankfort C. 3, p. 25-26; 35; Herodotus I, 6-26; Ancient Egypt by John Kendrick Bk. I p. 339; Egyptian Religion by Frankfort, p. 64, 73 and 88; Zeller's Hist. of Phil. p. 61; Wm. Turner's Hist. of Phil. p. 41; Plato Phaedo C. 15, 16, 49).
The doctrine and philosophy of opposites is further demonstrated by the Egyptian Creation story, in which Order came out of Chaos and which was represented by four pairs of opposites i.e., male and female gods.
(a) Nun and Naunet i.e., primeval Matter and Space.
(b) Huk and Hauket i.e., Illimitable and the Boundless.
(c) Huh and Hauhet, i.e., Darkness and Obscurity.
(d) Amon and Amaunet, i.e., the hidden and concealed ones (the Air, Wind).
Clearly the doctrine of opposites was a basic philosophy of the Egyptians, being connected with not only the Gods of their Mystery dramas, but with their Cosmology, and since this connection makes the doctrine one of the earliest in the development of Egyptian thought, it antedates the reign of Menes, and means that the Egyptians were familiar with it before 3000 B.C.
Under these circumstances and in consequence of these facts, the Egyptian Mystery System was the source of the doctrines
Topics
Greek Philospohy is Stolen Egyptian Philosophy
The Memphite Theology is the Basis of all Important Doctrines of Greek Philosophy
Greek Philosophy was Alien to the Greeks
Greek Philosophy was the offspring of the Egyptian Mystery System
The Egyptians Educated the Greeks
The Curriculum of the Egyptian Mystery System
The Pre-Socratic Philosophers and the teaching Ascribed to them
The Athenian Philosophers
1. Socrates
2. Plato
3. Aristotle