The Wiccan Rede: "An it harms none, do what thou will." is almost universally accepted amongst the groups.
Most groups tend to be polytheistic, animists, pantheists, et. One is not "converted" to Wicca, rather, the new comer feels a sense of "coming home", or, more poetically, "The Goddess calls to her own".
Nature plays a big part in most traditions, either as direct personification of the God/dess, or as aspects of them. There is no counterpart to the Devil, as such, in the Pagan religions... no personification of 'all evil', rather, the choice is there for all to make.
However, there is the Law of Three Fold Return, which states "That which thou dost send out shall return three fold", so good begets good, and evil befalls those who are evil (a horrendous understatement / simplification, but true).
Origin: spells-and-chants.blogspot.com
