11.It is incumbent upon the Aghṣán, the Afnán and My kindred to turn, one and all, their faces towards the Most Mighty Branch. Consider that which We have revealed in Our Most Holy Book: “When the ocean of My presence hath ebbed and the Book of My Revelation is ended, turn your faces toward Him Whom God hath purposed, Who hath branched from this Ancient Root.” The object of this sacred verse is none other except the Most Mighty Branch (‘Abdu’l-Bahá). Thus have We graciously revealed unto you our potent Will, and I am verily the Gracious, the All-Powerful.
12.In accordance with the explicit text of the Kitáb-i-Aqdas Bahá’u’lláh hath made the Centre of the Covenant the Interpreter of His Word—a Covenant so firm and mighty that from the beginning of time until the present day no religious Dispensation hath produced its like.
...Bahá’u’lláh covenanted, not that I (‘Abdu’l-Bahá) am the Promised One, but that ‘Abdu’l-Bahá is the Expounder of the Book and the Centre of His Covenant, and that the Promised One of Bahá’u’lláh will appear after one thousand or thousands of years. This is the Covenant which Bahá’u’lláh made. If a person shall deviate, he is not acceptable at the threshold of Bahá’u’lláh. In case of difference, ‘Abdu’l-Bahá must be consulted. All must revolve around his good pleasure. After ‘Abdu’l-Bahá, whenever the Universal House of Justice is organized it will ward off differences.
14.Inasmuch as great differences and divergences of denominational belief had arisen throughout the past, every man with a new idea attributing it to God, Bahá’u’lláh desired that there should not be any ground or reason for disagreement among the Bahá’ís. Therefore, with His own pen He wrote the Book of His Covenant, addressing His relations and all people of the world, saying,
“Verily, I have appointed One Who is the Center of My Covenant. All must obey Him; all must turn to Him; He is the Expounder of My Book, and He is informed of My purpose. All must turn to Him. Whatsoever He says is correct, for, verily, He knoweth the texts of My Book. Other than He, no one doth know My Book.” The purpose of this statement is that there should never be discord and divergence among the Bahá’ís but that they should always be unified and agreed.... Therefore, whosoever obeys the Center of the Covenant appointed by Bahá’u’lláh has obeyed Bahá’u’lláh, and whosoever disobeys Him has disobeyed Bahá’u’lláh....
...Beware! Beware! lest anyone should speak from the authority of his own thoughts or create a new thing out of himself. Beware! Beware! According to the explicit Covenant of Bahá’u’lláh you should care nothing at all for such a person. Bahá’u’lláh shuns such souls.
15.He is, and should for all time be regarded, first and foremost, as the Center and Pivot of Bahá’u’lláh’s peerless and all-enfolding Covenant, His most exalted Handiwork, the stainless Mirror of His light, the perfect Exemplar of His teachings, the unerring Interpreter of His Word, the embodiment of every Bahá’í ideal, the incarnation of every Bahá’í virtue, the Most Mighty Branch sprung from the Ancient Root, the Limb of the Law of God, the Being “round Whom all names revolve”, the Mainspring of the Oneness of Humanity, the Ensign of the Most Great Peace, the Moon of the Central Orb of this most holy Dispensation—styles and titles that are implicit and find their truest, their highest and fairest expression in the magic name ‘Abdu’l-Bahá. He is, above and beyond these appellations, the “Mystery of God”—an expression by which Bahá’u’lláh Himself has chosen to designate Him, and which, while it does not by any means justify us to assign to Him the station of Prophethood, indicates how in the person of ‘Abdu’l-Bahá the incompatible characteristics of a human nature and superhuman knowledge and perfection have been blended and are completely harmonized.
16.Bahá’u’lláh, the Revealer of God’s Word in this Day, the Source of Authority, the Fountainhead of Justice, the Creator of a new World Order, the Establisher of the Most Great Peace, the Inspirer and Founder of a world civilization, the Judge, the Lawgiver, the Unifier and Redeemer of all mankind, has proclaimed the advent of God’s Kingdom on earth, has formulated its laws and ordinances, enunciated its principles, and ordained its institutions. To direct and canalize the forces released by His Revelation He instituted His Covenant, whose power has preserved the integrity of His Faith, maintained its unity and stimulated its world-wide expansion throughout the successive ministries of ‘Abdu’l-Bahá and Shoghi Effendi. It continues to fulfil its life-giving purpose through the agency of the Universal House of Justice whose fundamental object, as one of the twin successors of Bahá’u’lláh and ‘Abdu’l-Bahá, is to ensure the continuity of that divinely-appointed authority which flows from the Source of the Faith, to safeguard the unity of its followers, and to maintain the integrity and flexibility of its teachings.
17.As to the most great characteristic of the revelation of Bahá’u’lláh, a specific teaching not given by any of the Prophets of the past: It is the ordination and appointment of the Center of the Covenant. By this appointment and provision He has safeguarded and protected the religion of God against differences and schisms, making it impossible for anyone to create a new sect or faction of belief.
18.To direct and canalize these forces let loose by this Heaven-sent process, and to insure their harmonious and continuous operation after His ascension, an instrument divinely ordained, invested with indisputable authority, organically linked with the Author of the Revelation Himself, was clearly indispensable. That instrument Bahá’u’lláh had expressly provided through the institution of the Covenant, an institution which he had firmly established prior to His ascension. This same Covenant He had anticipated in His Kitáb-i-Aqdas, had alluded to it as He bade His last farewell to the members of His family, who had been summoned to His bed-side, in the days immediately preceding His ascension, and had incorporated it in a special document which He designated as “the Book of My Covenant,” and which He entrusted, during His last illness, to His eldest son ‘Abdu’l-Bahá.
Written entirely in His own hand ... this unique and epoch-making Document, designated by Bahá’u’lláh as His “Most Great Tablet,” and alluded to by Him as the “Crimson Book” in His “Epistle to the Son of the Wolf,” can find no parallel in the Scriptures of any previous Dispensation, not excluding that of the Báb Himself. For nowhere in the books pertaining to any of the world’s religious systems, not even among the writings of the Author of the Bábí Revelation, do we find any single document establishing a Covenant endowed with an authority comparable to the Covenant which Bahá’u’lláh had Himself instituted.
19....There is, though, a great difference between this and previous Dispensations, for Bahá’u’lláh has written that this is “the Day which shall not be followed by night” (“God Passes By”, p. 245). He has given us His Covenant which provides for a continuing centre of divine guidance in the world. The Bahá’í Faith has not lacked for ambitious men who would seize the reins of authority and distort the Faith for their own ends, but in every case they have broken themselves and dashed their hopes on the rock of the Covenant.