- Das Heilige: Über das Irrationale in der Idee des Göttlichen und sein Verhältnis zum Rationalen
- Mysticism: East and West
- Mysticism East and West
- The idea of the holy: an inquiry into the non-rational factor in the idea of the divine and its relation to the rational
- The Kingdom of God and the Son of Man: A Study in the History of Religion
- Eugene B. Borowitz
- Denyse O'Leary
- Mark Tessler
- David N. Elkins
- Robert Gange
- John Schwarz
- Peter Jensen
- Gerald R. Cragg
- Alec R. Vidler
- Elonka Dunin
- Paul R. House
- James S. Jeffers
- David Peterson
- David A. deSilva
- Jeff Cook
- Jean-Charles Deniau
- Alfred J. Hoerth
- Walter Schmithals
- Michael E. Cavanagh
- ابوالحسن بنیصدر