Shoghi Effendi's letter to the Baha'is of the West clarifying the stations of the Bab, Baha'u'llah and Abdu'l-Baha as well as the features of the Baha'i Administrative Order. Offers a key to understanding the fundamental truths of the Faith, truths that Shoghi Effendi says wills "powerfully reinforce the vigor of our spiritual life" and offer "fresh inspiration and added sustenance as we labor for the propagation of the Faith."