Hymn Before Sleep (Hymnus Ante Somnum)
by Aurelius Clemens Prudentius

Newly Translated Into English Verse By R. Martin Pope is below this original.
Hymnus Ante Somnum
Ades Pater supreme,
quem nemo vidit unquam,
Patrisque sermo Christe,
et Spiritus benigne.
O Trinitatis huius
vis una, lumen unum,
Deus ex Deo perennis,
Deus ex utroque missus.
Fluxit labor diei,
redit et quietis hora,
blandus sopor vicissim
fessos relaxat artus.
Mens aestuans procellis
curisque sauciata
totis bibit medullis
obliviale poclum.
Serpit per omne corpus
Lethaea vis, nec ullum
miseris doloris aegri
patitur manere sensum.
Lex haec data est caducis
Deo iubente membris,
ut temperet laborem
medicabilis voluptas.
Sed dum pererrat omnes
quies amica venas,
pectusque feriatum
placat rigante somno:
Liber vagat per auras
rapido vigore sensus,
variasque per figuras,
quae sunt operta, cernit.
Quia mens soluta curis,
cui est origo caelum,
purusque fons ab aethra
iners iacere nescit.
Imitata multiformes
facies sibi ipsa fingit,
per quas repente currens
tenui fruatur actu.
Sed sensa somniantum
dispar fatigat horror,
nunc splendor intererrat
qui dat futura nosse.
Plerumque dissipatis 
mendax imago veris
animos pavore maestos
ambage fallit atra.
Quem rara culpa morum
non polluit frequenter,
nunc lux serena vibrans
res edocet latentes.
At qui coinquinatum
vitiis cor inpiavit,
lusus pavore multo
species videt tremendas.
Hoc patriarcha noster
sub carceris catena
geminis simul ministris
interpres adprobavit.
Quorum reversus unus
dat poculum tyranno,
ast alterum rapaces
fixum vorant volucres.
Ipsum deinde regem 
perplexa somniantem
monuit famem futuram
clausis cavere acervis.
Mox praesul ac tetrarches
regnum per omne iussus
sociam tenere virgam
dominae resedit aulae.
O quam profunda iustis
arcana per soporem
aperit tuenda Christus,
quam clara! quam tacenda!
Evangelista summi
fidissimus magistri
signata quae latebant
nebulis videt remotis:
ipsum tonantis agnum
de caede purpurantem,
qui conscium futuri
librum resignat unus.
Huius manum potentem
gladius perarmat anceps
et fulgurans utrimque
duplicem minatur ictum.
Quaesitor ille solus
animaeque corporisque
ensisque bis timendus
prima ac secunda mors est.
idem tamen benignus
ultor retundit iram
paucosque non piorum
patitur perire in aevum.
Huic inclitus perenne
tribuit Pater tribunal,
hunc obtinere iussit
nomen supra omne nomen.
Hic praepotens cruenti
extinctor antichristi,
qui de furente monstro
pulchrum refert tropaeum.
Quam bestiam capacem
populosque devorantem,
quam sanguinis charybdem
Ioannis execratur.
Haec nempe, quae sacratum
praeferre nomen ausa est,
imam petit gehennam
Christo perempta vero.
Tali sopore iustus
mentem relaxat heros,
ut spiritu sagaci
caelum peragret omne.
Nos nil meremur horum,
quos creber inplet error,
concreta quos malarum
vitiat cupido rerum.
Sat est quiete dulci
fessum fovere corpus:
sat, si nihil sinistrum
vanae minentur umbrae.
Cultor Dei memento
te fontis et lavacri
rorem subisse sanctum,
te chrismate innotatum.
Fac, cum vocante somno
castum petis cubile,
frontem locumque cordis
crucis figura signet.
Crux pellit omne crimen,
fugiunt crucem tenebrae:
tali dicata signo
mens fluctuare nescit.
Procul, o procul vagantum
portenta somniorum,
procul esto pervicaci
praestigiator astu!
O tortuose serpens,
qui mille per Maeandros
fraudesque flexuosas
agitas quieta corda,
Discede, Christus hic est,
hic Christus est, liquesce:
signum quod ipse nosti
damnat tuam catervam.
Corpus licet fatiscens
iaceat recline paullum,
Christum tamen sub ipso
meditabimur sopore.
Hymn Before Sleep
Draw near, Almighty Father,
Ne'er seen by mortal eye;
Come, O Thou Word eternal,
O Spirit blest, be nigh.
One light of threefold Godhead,
One power that all transcends;
God is of God begotten,
And God from both descends.
The hour of rest approaches,
The toils of day are past,
And o'er our tired bodies
Sleep's gentle charm is cast.
The mind, by cares tormented
Amid life's storm and stress,
Drinks deep the wondrous potion
That brings forgetfulness.
O'er weary, toil-worn mortals
The spells of Lethe steal;
Sad hearts lose all their sorrow,
Nor pain nor anguish feel.
For to His frail creation
God gave this law to keep,
That labour should be lightened
By soft and healing sleep.
But while sweet languor wanders
Through all the pulsing veins,
And, wrapt in dewy slumber,
The heart at rest remains,
The soul, in wakeful vigour,
Aloft in freedom flies,
And sees in many a semblance
The hidden mysteries.
For, freed from care, the spirit
That came from out the sky,
Born of the stainless aether,
Can never idle lie.
A thousand changing phantoms
She fashions through the night,
And 'midst a world of fancy
Pursues her rapid flight.
But divers are the visions
That night to dreamers shows;
Rare gleams of straying splendour
The future may disclose;
More oft the truth is darkened,
And lying fantasy
Deceives the affrighted sleeper
With cunning treachery.
To him whose life is holy
The things that are concealed
Lie open to his spirit
In radiant light revealed;
But he whose heart is blackened,
With many a sin imbued,
Sees phantoms grim and ghastly
That beckon and delude.
So in the Egyptian dungeon
The patriarch of old
Unto the king's two servants
Their fateful visions told:
And one is brought from prison
The monarch's wine to pour,
One, on the gibbet hanging,
Foul birds of prey devour,
He warned the king, distracted
By riddles of the night,
To hoard the plenteous harvests
Against the years of blight.
Soon, lord of half a kingdom,
A mighty potentate,
He shares the royal sceptre
And dwells in princely state.
But ah! how deep the secrets
The holy sleeper sees
To whom Christ shows His highest,
Most sacred mysteries.
For God's most faithful servant
The clouds were rolled away,
And John beheld the wonders
That sealed from mortals lay.
The Lamb of God, encrimsoned
With sacrificial stains,
Alone the Book can open
That destiny contains.
By His strong hand is wielded
A keen, two-edg'd brand
That, flashing like the lightning,
Smites swift on either hand.
Before His bar of judgment
Both soul and body lie;
He whom that dread sword smiteth
The second death shall die.
Yet mercy tempers justice,
And few the Avenger sends
(Whose guilt is past all pardon)
To death that never ends.
To Him the Father yieldeth
The judgment-seat of Heaven;
To Him a Name excelling
All other names is given.
For by His strength transcendent
Shall Antichrist be slain,
And from that raging monster
Fair trophies shall He gain:
That all-devouring Dragon,
With blood of martyrs red,
On whose abhorr'd power
John's solemn curse is laid.
And thus the proud usurper
Of His high name is cast
By Him, the true Christ, vanquished
To deepest hell at last.
Upon the saint heroic
Such wondrous slumber falls
That, in the spirit roaming,
He treads heaven's highest halls.
We may not, in our weakness,
To dreams like these aspire,
Whose souls are steeped in error
And evil things desire.
Enough, if weary bodies
In peaceful sleep may rest;
Enough, if no dark powers
Our slumbering souls molest.
Christian! the font remember,
The sacramental vow,
The holy water sprinkled,
The oil that marked thy brow!
When at sleep's call thou seekest
To rest in slumber chaste,
Let first the sacred emblem
On breast and brow be traced.
The Cross dispels all darkness,
All sin before it flies,
And by that sign protected
The mind all fear defies.
Avaunt! ye fleeting phantoms
That mock our midnight hours;
Avaunt! thou great Deceiver
With all thy guileful powers.
Thou Serpent, old and crafty,
Who by a thousand arts
And manifold temptations
Dost vex our sleeping hearts,
Vanish! for Christ is with us;
Away! 'tis Christ the Lord:
The sign thou must acknowledge
Condemns thy hellish horde.
And, though the weary body
Relaxed in sleep may be,
Our hearts, Lord, e'en in slumber,
Shall meditate on Thee.