Horus and Set are the dual God.
"the sun and the moon are united as described in the Hermetic Marriage, which is in truth, the marriage of the body and the spirit for the mutual development of each other. " - The Initiates of the Flame Manly P. Hall pg. 41
"The Marriage of the Sun and Moon: This takes place in man when the heart and mind are joined in eternal union. It occurs when the positive and negative poles within are united, and from that union is made the Philosopher's Stone." - The Initiates of the Flame Manly P. Hall pg. 40
That which is above is like unto that which is below. And that which is below is like unto that which is above. The principal is often shown in the Reflecting Pool. Reflecting Pools which represents the Nile or Isis are often accompanied with an Obelisk.
The Washington Monument in Washington, D.C., USA pictured above with its accompanying Reflecting Pool which also in a straight line with the white house.
Baphomet represents this same duality.
The dual principle of "male" and "female" [in Masonic teachings] is represented by the "square and compass." The "compass" represents OSIRIS, the male god of the Egyptians, while the "square" is the symbol representing ISIS, the female goddess of Egypt - both are sexual symbols. (Taken from: Ragon's Cours. Philosophique page 102.)
https://ipfs.busy.org/ipfs/QmbP5AF2maRDGn8d4G9nQJMyG1nGxG3NiB1U1fnMbqYcSM
"The Five Pointed Star: This picture, known to all Masons, is that of the Soul. It is the Star of Bethlehem, which heralds the coming of the Christ within. The two clasped hands are the spirit and body united In the marriage of the Lamb. It is from the union of the higher with the lower that the Christ is born. " -The Initiates of the Flame Manly P. Hall pg. 38
"Plato traveled widely and was initiated by the Egyptians into he profundities of Hermetic philosophy. He also derived much from the doctrines of the Pythagoreans." - Secret Teachings of All The Ages Manly P. Hall pg. 12