Consciousness, by Wm. Keith Bookwalter. (1996) Thoughts on a Bahá'í approach to human consciousness which the author terms "A Physical / Psychospiritual Theory of Consciousness"; Bahá'u'lláh's teachings on consciousness and the body / brain / mind / soul connection; the "ghost in the human machine."
Fourth Dimensional Consciousness, by Marie A. Watson. (1921) (Alleged) words of Abdu'l-Bahá, taken from notes from a pilgrimage to Haifa in 1921.