Editor's Note: Two groups of people who present problems of categorization are the groups variously called secular Jews -- alternately non-religious, non-practicing, or non-believing Jews -- who hold Judaism to be more a matter of culture or ethnicity than of religious belief, and therefore identify as Jews on those bases; and Messianic Jews, who promote beliefs (such as the existence and divinity of Jesus of Nazareth) traditionally associated with Christianity, and whose status as being a part of Judaism is therefore disclaimed by virtually all mainstream Jewish denominations.