Though practices may vary, most traditions have many similarities, such as the working of magic and a respect for nature. Most Witches find enough common ground for mutual support and productive networking throughout the Craft community. This is the antithesis of the Witchcraft experience. Most Witches come to the Craft through reading and communing with nature and later finding like-minded groups. Witches tend to be highly individualistic.
Witchcraft is a Pagan folk-religion of personal experience rather than transmitted revelation.
Covens may keep a similar group book. There is no one document taken by all Wiccans as authoritative, as in Judaism, Christianity, or Islam. Some do and some don't. Since a commonly-held belief is that what is sent out is returned to the sender threefold, Witches tend to be very careful with spells. A spell is a formula, or series of steps, to direct the will to a desired end.