Sadi was one of the major medieval Persian poets of the 12th century. Here’s a soulful passage on merging with the Divine.
Passage
Happy are the days of them that are infatuated by love for Him, whether they be sorrowed by separation from Him or made joyous by His presence.
They are mendicants who fly from worldly sovereignty; in the hope of meeting Him they are patient in their mendicity. Oft have they drunk of the wine of anguish; be it bitter, they remain silent. In the remembrance of Him patience is not bitter, for wormwood is sweet from the hand of a friend.
They that are captive in the coils of His love, seek not to escape; they suffer reproach, but are monarchs in the seclusion of their meditation, and their way is not known. They are like the temple of Jerusalem, splendid of which is the interior, but whose outer wall is left in ruin.
Like moths, they burn themselves in the fire of love. Their beloved is in their breasts, yet do they seek Him; though near a fountain, their lips are parched.
A. Hart Edwards. The Bustan of Sadi, 1911.