- Universal House of Justice. Meditation, Prayer, and Spiritualization (1983-09-01). Practicing personal spirituality and methods for achieving spiritual growth.
- Universal House of Justice. Spiritual Growth, Essential Requisites for (1983-09-01). Letter to Europe; its historically-recent turn away from religion, six ways to improve spirituality, and the importance of prayer and meditation.
- National Spiritual Assembly of the Bahá'ís of Ireland, Adib Taherzadeh. Spiritualization of the Bahá'í Community: A Plan for Teaching (1982). A three-part collection consisting of a letter from the NSA of Ireland, a letter from Taherzadeh to the Bahá'ís of Ireland regarding the spiritualization of the Bahá'í community, and the preamble for a plan of action for teaching.
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