The Báb explains His relationship to Bahau’llah

In the Qayyúmu’l-Asmá—the Báb’s commentary on the Súrih of Joseph—characterized by the Author of the Íqán as “the first, the greatest and mightiest” of the books revealed by the Báb, we read the following references to Bahá’u’lláh:

“Out of utter nothingness, O great and omnipotent Master, Thou hast, through the celestial potency of Thy might, brought me forth and raised me up to proclaim this Revelation. I have made none other but Thee my trust; I have clung to no will but Thy will… O Thou Remnant of God! I have sacrificed myself wholly for Thee: I have accepted curses for Thy sake, and have yearned for naught but martyrdom in the path of Thy love. Sufficient witness unto me is God, the Exalted, the Protector, the Ancient of Days.”  

(‘The Dispensation of Baha’u’llah; included in ‘The World Order of Baha’u’llah’)