Bahá’u’lláh’s Revelation “flowing out, in that extremely perilous hour… and is now under our very eyes, shaping the course of human society”

What, we may well inquire at this juncture, were the nature and implications of that Revelation which, manifesting itself so soon after the Declaration of the Báb, abolished, at one stroke, the Dispensation which that Faith had so newly proclaimed, and upheld, with such vehemence and force, the Divine authority of its Author? What, we may well pause to consider, were the claims of Him Who, Himself a disciple of the Báb, had, at such an early stage, regarded Himself as empowered to abrogate the Law identified with His beloved Master? What, we may further reflect, could be the relationship between the religious Systems established before Him and His own Revelation—a Revelation which, flowing out, in that extremely perilous hour, from His travailing soul, pierced the gloom that had settled upon that pestilential pit, and, bursting through its walls, and propagating itself as far as the ends of the earth, infused into the entire body of mankind its boundless potentialities, and is now under our very eyes, shaping the course of human society? 

- Shoghi Effendi  (God Passes By, chapter 6)

How each Founder of previous religions found Himself “the chosen recipient of the outpouring grace of the Almighty”

The circumstances in which the Vehicle of this newborn Revelation, following with such swiftness that of the Báb, received the first intimations of His sublime mission recall, and indeed surpass in poignancy the soul-shaking experience of Moses when confronted by the Burning Bush in the wilderness of Sinai; of Zoroaster when awakened to His mission by a succession of seven visions; of Jesus when coming out of the waters of the Jordan He saw the heavens opened and the Holy Ghost descend like a dove and light upon Him; of Muhammad when in the Cave of Hira, outside of the holy city of Mecca, the voice of Gabriel bade Him “cry in the name of Thy Lord”; and of the Báb when in a dream He approached the bleeding head of the Imám Husayn, and, quaffing the blood that dripped from his lacerated throat, awoke to find Himself the chosen recipient of the outpouring grace of the Almighty. 

- Shoghi Effendi  (God Passes By, chapter 6)

References about Bahá’u’lláh and the Báb: - From St. John the Divine and Shaykh Ahmad-i-Ahsá’í

St. John the Divine had himself, with reference to these two successive Revelations, clearly prophesied: “The second woe is past; and, behold the third woe cometh quickly.” “This third woe,” ‘Abdu’l‑Bahá, commenting upon this verse, has explained, “is the day of the Manifestation of Bahá’u’lláh, the Day of God, and it is near to the day of the appearance of the Báb.” “All the peoples of the world,” He moreover has asserted, “are awaiting two Manifestations, Who must be contemporaneous; all wait for the fulfillment of this promise.” And again: “The essential fact is that all are promised two Manifestations, Who will come one following on the other.” Shaykh Ahmad-i-Ahsá’í, that luminous star of Divine guidance who had so clearly perceived, before the year sixty, the approaching glory of Bahá’u’lláh, and laid stress upon “the twin Revelations which are to follow each other in rapid succession,” had, on his part, made this significant statement regarding the approaching hour of that supreme Revelation, in an epistle addressed in his own hand to Siyyid Kázim: “The mystery of this Cause must needs be made manifest, and the secret of this Message must needs be divulged. I can say no more. I can appoint no time. His Cause will be made known after Hín (68).” 

- Shoghi Effendi  (God Passes By, chapter 6)

The” so brief an interval” between the Revelations of the Báb and Bahá’u’lláh’: - “a secret that no man can unravel, and a mystery such as no mind can fathom”

During nine years, as foretold by the Báb Himself, swiftly, mysteriously and irresistibly the embryonic Faith conceived by Him had been developing until, at the fixed hour, the burden of the promised Cause of God was cast amidst the gloom and agony of the Síyáh-Chál of Ṭihrán. “Behold,” Bahá’u’lláh Himself, years later, testified, in refutation of the claims of those who had rejected the validity of His mission following so closely upon that of the Báb, “how immediately upon the completion of the ninth year of this wondrous, this most holy and merciful Dispensation, the requisite number of pure, of wholly consecrated and sanctified souls has been most secretly consummated.” “That so brief an interval,” He, moreover has asserted, “should have separated this most mighty and wondrous Revelation from Mine own previous Manifestation is a secret that no man can unravel, and a mystery such as no mind can fathom. Its duration had been foreordained.” 

- Shoghi Effendi  (God Passes By, chapter 6)

“In this most dark and dreadful hour a New Light was about to break in glory on Persia’s somber horizon.”

At a time when the Cause of the Báb seemed to be hovering on the brink of extinction, when the hopes and ambitions which animated it had, to all human seeming, been frustrated, when the colossal sacrifices of its unnumbered lovers appeared to have been made in vain, the Divine Promise enshrined within it was about to be suddenly redeemed, and its final perfection mysteriously manifested. The Bábí Dispensation was being brought to its close (not prematurely but in its own appointed time), and was yielding its destined fruit and revealing its ultimate purpose—the birth of the Mission of Bahá’u’lláh. In this most dark and dreadful hour a New Light was about to break in glory on Persia’s somber horizon. As a result of what was in fact an evolving, ripening process, the most momentous if not the most spectacular stage in the Heroic Age of the Faith was now about to open. 

- Shoghi Effendi  (God Passes By, chapter 6)