An Exposition of the Mysteries (Pushaq Raze) is an explanation of the significance of the Eucharistic Service or Qurbana Qadisha. It is attributed to Mar Narsai (437-502 A.D.), the great poet-theologian and teacher of the Assyrian Church of the East. This small, but valuable work was edited in the original Syriac by the late Qashisha Yosip dÕKelaita and printed with a translation into Assyrian at the Assyrian Press in Mosul in 1928. An English translation has been added to this reprint.