Advent's Final Hymn

This is the original Latin, from the 7th. century Liturgia Horarum:

 

Conditor alme siderum
aetérna lux credéntium
Christe redémptor ómnium
exáudi preces[voces] súpplicum

Qui cóndolens intéritu
mortis perire saeculum
salvásti mundum languidum
donans reis remedium.

Vergénte mundi véspere
uti sponsus de thálamo
egréssus honestissima
Virginis matris cláusula.

Cuius forti ponténtiae
genu curvántur ómnia
caeléstia, terréstia
nutu faténtur súbdita.

Te, Sancte fide quáesumus,
venture judex sáeculi,
consérva nos in témpore
hostis a telo perfidi.

Sit, Christe rex piissime
tibi Patríque glória
cum Spíritu Paráclito
in sempitérna sáecula.

Virtus, honor, laus, gloria
Deo Patri cum Filio,
Sancto simul Paraclito,
in saeculorum saecula

This is the English translation of John M. Neale found in the 1852 Hymnal Noted:

Creator of the stars of night,
Thy people’s everlasting light,
Jesu, Redeemer, save us all,
And hear Thy servants when they call.

Thou, grieving that the ancient curse
Should doom to death a universe,
Hast found the medicine, full of grace,
To save and heal a ruined race.

Thou cam’st, the Bridegroom of the bride,
As drew the world to evening-tide;
Proceeding from a virgin shrine,
The spotless Victim all divine.

At Whose dread Name, majestic now,
All knees must bend, all hearts must bow;
And things celestial Thee shall own,
And things terrestrial, Lord alone.

O Thou Whose coming is with dread
To judge and doom the quick and dead,
Preserve us, while we dwell below,
From every insult of the foe.

To God the Father, God the Son,
And God the Spirit, Three in One,
Laud, honor, might, and glory be
From age to age eternally.

After what seems to be a long wait from the fall of Adam, humanity finally gets its answer:

Ero cras.