June 12

No overt reference is made to Bahá’u’lláh’s own as yet unannounced mission; rather, The Book of Certitude is organized around a vigorous exposition of the mission of the martyred Báb. Not the least of the reasons for the book’s powerful influence on the Bábí community, which included a number of scholars and former seminarians, was the mastery of Islamic thought and teaching its author displays in demonstrating the Báb’s claim to have fulfilled the prophecies of Islam. Calling on the Bábís to be worthy of the trust which the Báb had placed in them and of the sacrifice of so many heroic lives, Bahá’u’lláh held out before them the challenge not only of bringing their personal lives into conformity with the Divine teachings, but of making their community a model for the heterogeneous population of Baghdad, the Iraqi provincial capital. 
(From ‘Baha’u’llah’; A statement prepared by the Bahá'í International Community Office of Public Information, at the request of the Universal House of Justice and published in 1992)