- Bahá'u'lláh's Teachings on Spiritual Reality, Paul Lample, comp. (1996). The quest for spirituality, the spiritual life, material and spiritual reality, the progress of the soul and humanity’s spiritual education.
- Role of Material Goods in Spiritual Development, The, by Lin Poyer (1989). On the challenge to develop creative, satisfying ways to live within a mass production/mass consumption 'materialistic' society; seen properly, material things can assist individuals in their personal growth rather than being a source of alientation.
- "The Role of Material Goods in Spiritual Development," by Lin Poyer: Commentary, by Will C. van den Hoonaard (1989).
- To the Believers in the Cradle of the Faith, by Universal House of Justice (2010-04-02). Regarding subjects such as family life, wealth, materialism, and justice.
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