Description of the Kitáb-i-Íqán (Book of Certitude)

Within a compass of two hundred pages it proclaims unequivocally the existence and oneness of a personal God, unknowable, inaccessible, the source of all Revelation, eternal, omniscient, omnipresent and almighty; asserts the relativity of religious truth and the continuity of Divine Revelation; affirms the unity of the Prophets, the universality of their Message, the identity of their fundamental teachings, the sanctity of their scriptures, and the twofold character of their stations; denounces the blindness and perversity of the divines and doctors of every age; cites and elucidates the allegorical passages of the New Testament, the abstruse verses of the Qur’án, and the cryptic Muḥammadan traditions which have bred those age-long misunderstandings, doubts and animosities that have sundered and kept apart the followers of the world’s leading religious systems; enumerates the essential prerequisites for the attainment by every true seeker of the object of his quest; demonstrates the validity, the sublimity and significance of the Báb’s Revelation; acclaims the heroism and detachment of His disciples; foreshadows, and prophesies the world-wide triumph of the Revelation promised to the people of the Bayán; upholds the purity and innocence of the Virgin Mary; glorifies the Imáms of the Faith of Muḥammad; celebrates the martyrdom, and lauds the spiritual sovereignty, of the Imám Ḥusayn; unfolds the meaning of such symbolic terms as "Return," "Resurrection," "Seal of the Prophets" and "Day of Judgment"; adumbrates and distinguishes between the three stages of Divine Revelation; and expatiates, in glowing terms, upon the glories and wonders of the "City of God," renewed, at fixed intervals, by the dispensation of Providence, for the guidance, the benefit and salvation of all mankind. Well may it be claimed that of all the books revealed by the Author of the Bahá’í Revelation, this Book alone, by sweeping away the age-long barriers that have so insurmountably separated the great religions of the world, has laid down a broad and unassailable foundation for the complete and permanent reconciliation of their followers.

Note: Shoghi Effendi adds that this Book is one of Baha'u'llah's “outstanding contributions to the world's religious literature” occupying a position of “unsurpassed preeminence among the doctrinal ... writings of the Author of the Baha'i Dispensation”. (Shoghi Effendi, God Passes By, p. 140)