Since the entire world is the arena for Mary's work, it is natural that a vast family is necessary, with each individual and group working in their own environment and according to their own vocation. Each group can have certain guidelines for practices to be adopted by the members. A great variety is possible: ranging from those with a minimum of rules to be followed, to those which demand more. One form is not better than another. The essence is not to be found in groups, rules or practices, but rather in that Marists are committed to live in the spirit of Mary with a missionary heart.