"Methinks, they are like the angels which Thou hast created of snow and of fire."

"The hearts that yearn after Thee, O my God, are burnt up with the fire of their longing for Thee, and the eyes of them that love Thee weep sore by reason of their crushing separation from Thy court, and the voice of the lamentation of such as have set their hopes on Thee hath gone forth throughout Thy dominions.

Thou hast Thyself, O my God, protected them, by Thy sovereign might, from both extremities. But for the burning of their souls and the sighing of their hearts, they would be drowned in the midst of their tears, and but for the flood of their tears they would be burnt up by the fire of their hearts and the heat of their souls. Methinks, they are like the angels which Thou hast created of snow and of fire. Wilt Thou, despite such vehement longing, O my God, debar them from Thy presence, or drive them away, notwithstanding such fervor, from the door of Thy mercy? All hope is ready to be extinguished in the hearts of Thy chosen ones, O my God! Where are the breezes of Thy grace? They are hemmed in on all sides by their enemies; where are the ensigns of Thy triumph which Thou didst promise in Thy Tablets? ..."

-Bahá'u'lláh, Prayers and Meditations by Bahá’u’lláh, XCIV, pp. 157-158