Jalal al-Din Mohammad Rumi (1207-1273), was one of the greatest mystical poet of Iran. Here is a heart warming poem from his magnum opus Divan-e-Shams-e Tabrizi.

Passage

Thou who art my soul’s comfort in the season of sorrow,
Thou who art my spirit’s treasure in the bitterness of dearth!
That which the imagination has not conceived,
that which the understanding has not seen,
Visited my soul from Thee ; hence in worship I turn toward Thee.
By Thy grace I keep fixed on Eternity my amorous gaze,
Except, King, the pomps that perish lead me astray.
The favour of that one, who brings glad tidings of Thee,
Even without Thy summons, is sweeter in mine ear than songs.

F. Hadland Davis. The Persian Mystics Jalaluddin Rumi. John Murray, Albemarle Street, 1912.