In 1936 he wrote The Unfoldment of World Civilization; once again, as he so often did, Shoghi Effendi links this to the passing of 'Abdu'l-Bahá. It was a further exposition of the state of the world, the rapid political, moral and spiritual decline evident in it, the weakening of both Christianity and Islam, the dangers humanity in its heedlessness was running, and the strong, divine, hopeful remedy the teachings of Bahá'u'lláh had to offer. Important and educative as these wonderful letters of the Guardian were they provided, in their wealth of apposite quotations from Bahá'u'lláh's own words which the Guardian had translated and lavishly cited, spiritual sustenance for the believers, for we know that the World of the Manifestation of God is the food of the soul. They also contained innumerable beautifully translated passages from the beloved Master's Tablets. All this bounty the Guardian spread for the believers in feast after feast, nourished them and raised up a new strong generation of servants in the Faith. His words fired their imagination, challenged them to rise to new heights, drove their roots deeper in the fertile soil of the Cause.
- Ruhiyyih Khanum (‘The Priceless Pearl’)