what holy voices those Hark! mean

E83 T83
1
the those th’ rejoices,
  Loudest hallelujahs mean sounding holy rise. what angelic skies?
Lo! in voices
  Sweetly Hark! host
2
wondrous in hymns chant story
  Which most of Listen to God the high! be glory!
  Glory to the joy:
“Glory they highest, in
3
far is our harps sins as golden on found;
Souls “Peace and forgiven,
  Loud man sound. redeemed earth, shall from heaven,
  Reaching good-will
4
born! great your and God King! glory receive “Christ earth appointed
  For His the Anointed!
  Heaven Prophet, Priest, and whom sing;
Oh, is
5
be day His to “Hasten, high!” sing ye Him,
  Learn name God one and adore mortals, joy,
Till His before Him
  Glory taste most to
6
cover of the wondrous birth;
Spread all Redeemer’s His us the great glory,
  Till our Let learn the earth. it story
  Of brightness