The moon is a feminine symbol, universally representing the rhythm of time as it embodies the cycle. The phases of the moon symbolize immortality and eternity, enlightenment or the dar k side of Nature herself. It might reflect inner knowledge, or the phases of man's condition on earth, since it controls the tides, the rains, the waters, and the seasons. It is the middle ground between the light of the sun and the darkness of night, and thus often represents the realm between the conscious and the unconscious. In astrology, the moon is a symbol of the soul, and in the horoscope it determines the subject's capacity for reflection and adaptation. It also provides analogy for the stages of human development: the new moon is infancy, the crescent is youth and adolescence, the full moon is maturity and pregnancy, and the waning moon represents the decline of life, sleep.
By: umich.edu>~umfands>symbolism.html