The waxing and waning of the moon is a brilliant representation of our lives and how it is impacted by the forces that make us who we are. I'm referring to the life force and the soul. These concepts are called the Ka and the Ba in ancient Egyptian metaphysical thinking. The Ka is what animates creation in the physical plane. It is surging red blood that courses through the veins of animals. It is the strength of the powerful bull; this power manifesting in humans as the destructive alpha male. It is also food stuff that sustains us.
Ka as food offering
To further explain the Ka I use the concept of a ghost. A life force that sticks around in the material plane after physical death is a ghost. The Ba, the immortal soul, needs the life force in order to be on this journey of becoming. It is a double edged sword where you need the Ka but it also beats up your soul until you master it.
These two different ideas are in the Old Testament as well however both are misleadingly translated as soul. They are the Hebrew words nephesh and ruach. The nephesh is the life force and the ruach is the immortal soul. The nephesh is granted by the Lord, YHVH, and is represented roaming the earth in such figures as Cain, Ishmael, Esau, the Pharaoh etc., while the ruach is the domain of the spirits called the Elohim and represented by Abel, Abraham, Isaac, Jacob, Joseph, Moses etc. In the New Testament it is Jesus playing the role of the immortal soul and coming up against Herod the Great, Pontius Pilate, the Jews, and Satan who are representing the antagonist of the soul in some degree; the antagonist being the life force.
The moon in its monthly cycle, disappears for three days into what seems to be material incarnation or the 'waters' prior to reappearing in the night sky. From this time it grows in stature until it is complete as the full moon. It becomes a brilliant transfigured beacon in the darkness of matter. This is wisdom personified as Thoth in ancient Egypt.
Thoth with Lunar disk
This 'Eye of Horus', the soul, was damaged by Set the red beast but it is restored by Thoth with the help of other gods.
Eye of Horus
An important lesson taught here is that being able to see does not involve only sight but it needs the experience taught by wisdom. From this point the moon's monthly cycle continues to perpetually teach with the dismembering once again into fourteen pieces by the beast within us. The beast needs to feed to satiate its Ka and causes the fall of the moon once again into matter. However in this lunar cyclical journey of cleansing, the moon as the dismembered soul, Osiris in ancient Egypt, becomes stronger and rises again.