While many Jewish holidays revolve around the synagogue, the Seder is conducted in the family home, although communal Seders are also organized by synagogues, schools and community centers, some open to the general public. It is customary to invite guests, especially strangers and the needy. The Seder is integral to Jewish faith and identity: as explained in the Haggadah, if not for divine intervention and the Exodus, the Jewish people would still be slaves in Egypt. Therefore, the Seder is an occasion for praise and thanksgiving and for re-dedication to the idea of liberation. Furthermore, the words and rituals of the Seder are a primary vehicle for the transmission of the Jewish faith from grandparent to child, and from one generation to the next. Attending a Seder and eating matza on Passover is a widespread custom in the Jewish community, even among those who are not religiously observant.