The Moon (Luna) is paired with the Sun. It lights the night, as the Sun lights the day.
The Moon is the planet of the subconscious mind. Its is our intuition, our empathy, our instinct. The Moon rules our dreams and our emotions.
It is also the planet of fertility and our feelings. It is the planet of our very soul. The astrological relationship between the Sun and Moon determines how well our actions and emotions are harmonized.
The Moon gives us our sense of humor, and our sense of security. Mother stands for comfort, and the Moon is our motherly side. If the moon is overly strong, we can appear too domineering. If it is poorly aspected, we may appear weak and passive.
With the gravitational pull it exerts upon the Earth, the moon gives us our tides, the cycles of nature and influences the growth of all life on the planet.