Speaking in tongues, or glossolalia, is practiced in many different religions around the world. Dismissed as meaningless gibberish by some observers, it has been the subject of only a few fragmentary studies. The work of Felicitas D. Goodman represents the first cross-cultural analysis of this enigmatic behavior, and she brings to her research an extensive background in linguistics and anthropology. Dr. Goodman's fieldwork included living with apostolic...