“The Báb, the Exalted One,” ‘Abdu’l-Bahá more specifically affirms in another Tablet, “is the Morn of Truth, the splendor of Whose light shineth throughout all regions. He is also the Harbinger of the Most Great Light, the Abhá Luminary. The Blessed Beauty is the One promised by the sacred books of the past, the revelation of the Source of light that shone upon Mount Sinai, Whose fire glowed in the midst of the Burning Bush. We are, one and all, servants of their threshold, and stand each as a lowly keeper at their door.” “Every proof and prophecy,” is His still more emphatic warning, “every manner of evidence, whether based on reason or on the text of the scriptures and traditions, are to be regarded as centered in the persons of Bahá’u’lláh and the Báb. In them is to be found their complete fulfillment.” And finally, in His Will and Testament, the repository of His last wishes and parting instructions, He in the following passage, specifically designed to set forth the guiding principles of Bahá’í belief, sets the seal of His testimony on the Báb’s dual and exalted station: “The foundation of the belief of the people of Bahá (may my life be offered up for them) is this: His holiness the exalted One (the Báb) is the Manifestation of the unity and oneness of God and the Forerunner of the Ancient Beauty (Bahá’u’lláh). His holiness, the Abhá Beauty (Bahá’u’lláh) (may my life be offered up as a sacrifice for His steadfast friends) is the supreme Manifestation of God and the Day-Spring of His most divine Essence.” “All others,” He significantly adds, “are servants unto Him and do His bidding.” ‘Abdu’l-Bahá