"One of the greatest achivments of Shoghi Effendi's life was the publication, in 1944, of God Passes By, his comprehensive and reflective history of the first hundred years of the Cause, [it] threw open for believers a window on the spiritual process by which Bahá'u'lláh's purpose for humankind is being realized." (Century of Light, Commissioned by the Universal House of Justice, par. 6.12-6.13)