Baha'u'llah asks God “to protect the lamp of Thy Cause”

Praise be unto Thee, O Lord My God!  I ask Thee by Thy Name, through which Thou hast subdued all who are in the heavens and all who are on the earth, to protect the lamp of Thy Cause within the globe of Thine omnipotence and Thy bountiful favour, lest it be exposed to the blasts of denial from those who remain heedless of the mysteries of Thy name, the Unconstrained.  Increase, then, by the oil of Thy wisdom, the radiance of its light.  Thou, verily, hast power over all the dwellers of Thine earth and of Thy heaven.

I implore Thee, O My Lord, by that most exalted Word which hath struck terror into the hearts of all who are in the heavens and on the earth, save only those who have taken fast hold of Thy Sure Handle, not to abandon Me amidst Thy creatures.  Lift Me up, then, unto Thyself, cause Me to enter beneath the shadow of Thy mercy, and give Me to drink of the pure wine of Thy providence, that I may dwell within the tabernacle of Thy majesty and beneath the canopy of Thy favour.  Potent art Thou to do what pleaseth Thee.  Thou, verily, art the Help in Peril, the Self-Subsisting. 

- Baha’u’llah  (Lawh-i-Sultan [Tablet to Nasi’d-Din Shah], ‘The Summons of the Lord of Hosts’)