Bahá'u'lláh is not the Intermediary between other Manifestations and God. Each has His own relation to the Primal Source. But in the sense that Bahá'u'lláh is the greatest Manifestation to yet appear, the One Who consummates the Revelation of Moses; He was the One Moses conversed with in the Burning Bush. In other words Bahá'u'lláh identifies the glory of the Godhead on that occasion with Himself. No distinction can be made amongst the Prophets in the sense that They all proceed from One Source, and are of One Essence. But Their stations and functions in this world are different.