The Kitáb-i-Aqdas : The Most Holy Book

Shoghi Effendi feels that the unity of the Bahá’í Revelation as one complete whole embracing the Faith of the Báb should be emphasized... The Faith of the Báb should not be divorced from that of Bahá’u’lláh. Though the teachings of the Bayán have been abrogated and superseded by the laws of the Aqdas, yet due to the fact that the Báb considered Himself as the Forerunner of Bahá’u’lláh, we would regard His Dispensation together with that of Bahá’u’lláh as forming one entity, the former being introductory to the advent of the latter.

The Báb states that His laws are provisional and depend upon the acceptance of the future Manifestation. This is why in the Book of Aqdas Bahá’u’lláh sanctions some of the laws found in the Bayán, modifies others and sets aside many.

Just as the Bayán had been revealed by the Báb at about the mid-point of His Ministry, Bahá’u’lláh revealed the Kitáb-i-Aqdas around 1873, some twenty years after He had received, in the Síyáh-Chál of Ṭihrán, the intimation of His Revelation. In one of His Tablets He indicates that even after its revelation the Aqdas was withheld by Him for some time before it was sent to the friends in Írán. Thereafter, as Shoghi Effendi has related:

The formulation by Bahá’u’lláh, in His Kitáb-i-Aqdas, of the fundamental laws of His Dispensation was followed, as His Mission drew to a close, by the enunciation of certain precepts and principles which lie at the very core of His Faith, by the reaffirmation of truths He had previously proclaimed, by the elaboration and elucidation of some of the laws He had already laid down, by the revelation of further prophecies and warnings, and by the establishment of subsidiary ordinances designed to supplement the provisions