From its very beginnings in the eighteenth century, the Hasidic movement was suffused with a joyous enthusiasm and optimism derived from the notion of God being in all things. This led to an insistence on joy as an essential element in divine worship, and in consequence a distinctive attitude to prayer. This classic work, presented here with a new introduction, is a study of the attitudes of the hasidic rebbes to prayer. Louis Jacobs bases himself...