September 13

And who can fail to realize the sore need of bleeding humanity, in its present state of uncertainty and peril, for the regenerating Spirit of God, manifested this Day so powerfully in this Divine Dispensation? Four years of unprecedented warfare and world cataclysms, followed by another four years of bitter disappointment and suffering, have stirred deeply the conscience of mankind, and opened the eyes of an unbelieving world to the Power of the Spirit that alone can cure its sicknesses, heal its wounds, and establish the long-promised reign of undisturbed prosperity and peace. 
(Shoghi Effendi, excerpt from a letter dated March 12, 1923, to the Baha’is; ‘Baha’i Administration’)