At one time, Bahá’u’lláh had written down an ode of Rúmí’s for him, and had told him to turn his face toward the Báb and sing the words, set to a melody. And so as he wandered through the long dark nights, Ustád would sing these lines: 

I am lost, O Love, possessed and dazed, 
Love’s fool am I, in all the earth. 
They call me first among the crazed, 
Though I once came first for wit and worth. 

O Love, who sellest me this wine, 
O Love, for whom I burn and bleed, 
Love, for whom I cry and pine— 
Thou the Piper, I the reed. 

If Thou wishest me to live, 
Through me blow Thy holy breath. 
The touch of Jesus Thou wilt give 
To me, who’ve lain an age in death. 

Thou, both End and Origin, 
Thou without and Thou within— 
From every eye Thou hidest well, 
And yet in every eye dost dwell.

– ‘Abdu’l-Bahá, Memorials of the Faithful, referring to Ustád Ismá‘íl