AGNI PARTHENE: Angels singing praising and honouring the Holy theotokos, Mother of God

My Favorite Chant, though it was not chanted in Original Greek version but in Slavonic
It is used by the Eastern Catholic Sui Iuris Churches under the Byzantine Rite

A Orthodox Monk composed this!!! So is there any problem???
Nothings "Heretical" or Schismatic about this Hymn at all

      "Rejoice, O Bride Unwedded!

O Virgin pure, immaculate/ O Lady Theotokos

O Virgin Mother, Queen of all/ and fleece which is all dewy

More radiant than the rays of sun/ and higher than the heavens

Delight of virgin choruses/ superior to Angels.

Much brighter than the firmament/ and purer than the sun's light

More holy than the multitude/ of all the heav'nly armies."