Hi all. Hope you don't mind me landing midway into the discussion.
My understanding of the Moon and it's celestial symbolization comes from a mix of empiricism, spiritualism and universalism.
The Moon beyond all myths, traditional or ancient beliefs, and mystical associations is living proof of how simple and applicable it is for a celestial or heavenly body to have some sort of affect on us human beings here on earth.
The Moon as most of us know, based on scientists' delineations, governs the tides, and holds some magnetic or electromagnetic jurisdiction over the flow of bodies of water.
Being that us humans are made up of about 80 % Water it comes as no surprise that the Moon is a very important element in astrology and even on a more mundane measure.
The Moon, in my individuation, energetically reflects the Mother-Ship by which we respond to all of life's trials, rewards, beginnings, and ends.
The Moon in your own chart can reflect Importance but, on a different level than the Sun. The Sun itself is what, in part helped create us and of course sustains our life here on earth. Without it, we are without our physical life forces.
The Moon is what helped to gather the vital water resource that makes up so much of who we are, and properly disperse it since the beginning of time helping sustain the essentials of our soul.
Many people mistake the Sun for representing everything about a person's character while the Moon holds a larger influence over, one's personality.
So to put it simply the Moon represents your Home Base, your Mother-Ship, your Inner Reactions, your Comforts, your Needs, your Mana Pool,etc.