The progression of the moon through its phases is said to represent immortality and eternity, as well as enlightenment or the dark side of nature herself.
Since it governs the tides, the rains, the waterways, and the seasons, it might be a reflection of one's own inner knowledge or the stages that man goes through while living on earth.
It is the region between the aware and the unconscious, as it is situated between the light of the sun and the blackness of the night.
In astrology, the moon is considered to be a representation of the individual's soul, and its position in the horoscope is used to indicate the individual's potential for introspection and change.
It also serves as an analogy for the stages of human growth, with the new moon representing childhood and adolescence, the crescent representing youth and adulthood, the full moon representing maturity and pregnancy, and the waning moon representing the end of life and sleep.