1. The Quest for the Mystical Reality: Reflections on the Ontological Provenance of the Hekhalot Hymns and Visions2. Two Essential Qualities of Jewish Apocalyptic3. The Mystical Elements in Apocalyptic4. The Attitude Towards the Merkavah Speculations in the Literature of the Tannaimand Amoraim5. The Hekhalot Literature