Bahá’u’lláh’s overwhelming suffering: - “I have borne what no man, be he of the past or of the future, hath borne or will bear.”

And again: “I [Baá’u’lláh] have borne what no man, be he of the past or of the future, hath borne or will bear.” “Oceans of sadness,” He testifies in the Tablet of Qullu’ṭ-Ta‘ám, “have surged over Me, a drop of which no soul could bear to drink. Such is My grief that My soul hath well nigh departed from My body.” “Give ear, O Kamál!” He, in that same Tablet, depicting His plight, exclaims, “to the voice of this lowly, this forsaken ant, that hath hid itself in its hole, and whose desire is to depart from your midst, and vanish from your sight, by reason of that which the hands of men have wrought. God, verily, hath been witness between Me and His servants.” And again: “Woe is Me, woe is Me … All that I have seen from the day on which I first drank the pure milk from the breast of My mother until this moment hath been effaced from My memory, in consequence of that which the hands of the people have committed.” 

- Shoghi Effendi (‘God Passes By’)

Bahá’u’lláh’s overwhelming suffering: - “We were afflicted with the perfidy of Our friends”

“The wrongs which I suffer,” He [Bahá’u’lláh], in His Lawh-i-Maryam, laments, “have blotted out the wrongs suffered by My First Name (the Báb) from the Tablet of creation.” “O Maryam!” He continues, “From the Land of Ṭá (Tihrán), after countless afflictions, We reached ‘Iráq, at the bidding of the Tyrant of Persia, where, after the fetters of Our foes, We were afflicted with the perfidy of Our friends. God knoweth what befell Me thereafter!” 

- Shoghi Effendi (‘God Passes By’)

“The cup of Bahá’u’lláh’s sorrows was now running over.”

The cup of Bahá’u’lláh’s sorrows was now running over. All His exhortations, all His efforts to remedy a rapidly deteriorating situation, had remained fruitless. The velocity of His manifold woes was hourly and visibly increasing. Upon the sadness that filled His soul and the gravity of the situation confronting Him, His writings, revealed during that somber period, throw abundant light. In some of His prayers He poignantly confesses that “tribulation upon tribulation” had gathered about Him, that “adversaries with one consent” had fallen upon Him, that “wretchedness” had grievously touched Him, and that “woes at their blackest” had befallen Him. God Himself He calls upon as a Witness to His “sighs and lamentations,” His “powerlessness, poverty and destitution,” to the “injuries” He sustained, and the “abasement” He suffered. “So grievous hath been My weeping,” He, in one of these prayers, avows, “that I have been prevented from making mention of Thee and singing Thy praises.” “So loud hath been the voice of My lamentation,” He, in another passage, avers, “that every mother mourning for her child would be amazed, and would still her weeping and her grief.” 

- Shoghi Effendi ('God Passes By’)