High Quality Content by WIKIPEDIA articles! The Hymn of the Pearl (also Hymn of the Soul, Hymn of the Robe of Glory or Hymn of Judas Thomas the Apostle) is a passage of the apocryphal Acts of Thomas. In that work, originally written in Syriac, the Apostle Thomas sings the hymn while praying for himself and fellow prisoners. Some scholars believe the hymn antedates the Acts, as it only appears in one Syriac manuscript and one Greek manuscript of the Acts of Thomas. The author of the Hymn is unknown, though there is a belief that it was composed by the Syriac gnostic Bardaisan due to some parallels between his life and that of the hymn.