This book represents the first wide-scale presentation and interpretation of pre-kabbalistic, Jewish mysticism. This is the Hekhalot or Merkavah mysticism. The emphasis is on the conceptions of God, the angels, and man that the texts provide and that are the framework of the Judaic world view in late antiquity and the early Middle Ages.

This interpretation is based on the major works of this early Jewish mysticism: Hekhalot Rabbati ("The Greater Palaces"), Hekhalot Zutarti ("The Lesser Palaces"), Ma'aseh Merkavah ("The Working of the Chariot"), Merkavah Rabbah ("The Great Chariot)" and...