1934
Lost Christianity
1980
Money and the Meaning of Life
1991
A sense of the cosmos
1975
Why Can't We Be Good?
2006
Real philosophy
1990
The Essential Marcus Aurelius (Tarcher Cornerstone Editions)
2008
Modern esoteric spirituality
1992
The new religions
1970
Introduction to the Gurdjieff work
2009
Indestructible Question
1994
Time and the Soul
1998
What is God?
2009
I am not I
2016
The way of the physician
1985
A Little Book on Love
1996
The Heart of Philosophy
1982
The Upanishads
1999
On the way to self knowledge
1976
Sin and Scientism
1986
The sword of gnosis: metaphysics, cosmology, tradition, symbolism
1974
Espiritualidad De Los Movimientos Esotericos Modernos
2000
