The Moon...

The only natural satellite of the earth, being responsible (with the
sun) for its tidal action.

The moon is associated with witchcraft, magic, and sorcery, and is
considered to be the source of witches' power. The ancient witches of
Thessaly were said to have the power to draw the moon down from the
sky at their command; a symbolic ritual of drawing down the moon is
still performed in modern Witchcraft. Witches hold their meetings,
called 'circles' or 'sabbats', and perform their magic spells in
accordance with lunar phases. The waxing moon is propitious for
growth, achievement, good fortune, and healing spells; the waning
moon is propitious for banishing spells and the undoing of harm and
negative influences.

The moon itself is believed to cast a spell; one may become
moonstruck beneath its silvery rays. The term 'mania', derived
from 'moon', means ecstatic revelation; `lunacy' means possessed by
the spirit of Luna. Nights of the full moon provide the greatest
power for magic and the world of spirit.

In folklore those cursed by lycanthropy are said to turn into
werewolves under the spell of the full moon. In astrology the moon
exerts a powerful force in horoscopes and in daily affairs. As the
moon moves through the zodiac, different creative forces are brought
into play. According to astrologers, when the moon is between signs
it is a time of uncertainty and instability. See eclipse.

Related videos:
Mystery of the Full Moon.

Related books:
Dark Moon Mysteries: Wisdom, Power, and Magic of the Shadow World.
Divination by Flowers: The Hermetic Doctrine Concerning Solar and
Lunar Influences.
Full Moon Magic (Spell Casters , No 2).
Grandmother Moon: Lunar Magic in Our Lives - Spells, Rituals,
Goddesses, Legends, and Emotions Under the Moon.
Lady of the Night: A Handbook of Moon Magick & Rituals (Llewellyn's
Modern Witchcraft).
Moon Lore and Moon Magic.
Moon Magic: How to Use the Moon's Phases to Inspire and Influence
Your Relationships, Home Life, and Business.
Moon Magick: Myth & Magick, Crafts & Recipes, Rituals & Spells
(Llewellyn's Practical Magick).