6.1 Articles
- “Destiny and Freedom in the Bahá’í Writings” [2010]
- [Knowledge] “The Criteria of Knowledge: Beyond inspiration” [2018]
- [Search, Methods] “Methods and Qualities of the Seekers” [2008]
- [Soul] “Sufi stages of the soul in The Seven Valleys and The Four Valleys” [2003]
- “Will, Knowledge and Love in The Four Valleys” [1994]
6.2 Books and Essays
- The Eternal Quest for God [1989]
6.3 Letters
6.4 Prefaces, Introductions, and Reviews
- [The Eternal Quest for God] “Twenty Years Later”, An Introduction to the Portuguese Edition
6.5 Talks and Interviews
6.6 Translations