This article is from the Paganism FAQ, by susanhk@ccwf.cc.utexas.edu (Susan Harwood Kaczmarczik) with numerous contributions by others.
Well, if you're expecting to hear about sex and blood magic,
animal sacrifice, and ritual cruelty, then you'll be disappointed.
Forming or joining a coven is a spiritual commitment (the words coven
and covenant are related) that is entered into advisedly. Once that
bond is made, though, you find yourself in a spiritual community of
people who have roughly the same theology, getting together to
celebrate the passing of the seasons and the cycles of the moon,
providing support and comfort to its members -- a lot like a small
spiritual community of any faith. Another common saying in the Craft
is "In perfect love and perfect trust," and that sums up the
relationship among coveners pretty well.
Another kind of group for like-minded pagans to gather in is
called a circle. The ties between coven members are as close as those
between members of a family, and in some cases, closer. A circle is
similar to a group of friends -- you like to do things together, but
the bonds between members are not as serious as between coven-members.
 
Continue to: