He said: ‘Bid them recite: “Is there any Remover of difficulties save God? Say: Praised be God! He is God! All are His servants, and all abide by His bidding!” Tell them to repeat it five hundred times, nay, a thousand times, by day and by night, sleeping and waking, that haply the Countenance of Glory may be unveiled to their eyes, and tiers of light descend upon them.’

– Shoghi Effendi, quoting Bahá’u’lláh, God Passes By