A very important prayer prayed at various times by the Church …listed as common prayer in the Compendium of the Catechism:
Come, Creator Spirit
Come, Holy Spirit, Creator come,
From your bright heavenly throne!
Come, take possession of our souls,
And make them all your own.
You who are called the Paraclete,
Best gift of God above,
The living spring, the living fire,
Sweet unction, and true love!
You who are sevenfold in your grace,
Finger of God’s right hand,
His promise, teaching little ones
To speak and understand!
O guide our minds with your blessed light,
With love our hearts inflame,
And with your strength which never decays
Confirm our mortal frame.
Far from us drive our hellish foe
True peace unto us bring,
And through all perils guide us safe
Beneath your sacred wing.
Through you may we the Father know,
Through you the eternal Son
And you the Spirit of them both
Thrice-blessed three in one.
All glory to the Father be,
And to the risen Son;
The same to you, O Paraclete,
While endless ages run. Amen.
Veni, Creator Spiritus
Veni, creátor Spíritus,
mentes tuórum vísita,
imple supérna grátia,
quæ tu creásti péctora.
Qui díceris Paráclitus,
altíssimi donum Dei,
fons vivus, ignis, cáritas,
et spiritális únctio.
Tu septifórmis múnere,
dígitus patérnæ déxteræ,
tu rite promíssum Patris,
sermóne ditans gúttura.
Accénde lumen sénsibus,
infúnde amórem córdibus,
infírma nostri córporis
virtúte firmans pérpeti.
Hostem repéllas lóngius
pacémque dones prótinus;
ductóre sic te prævio
vitémus omne nóxium.
Per Te sciámus da Patrem
noscámus atque Fílium,
teque utriúsque Spíritum
credámus omni témpore.
Deo Patri sit glória,
et Fílio, qui a mórtuis
surréxit, ac Paráclito,
in sæculórum sæcula. Amen.
vatican.va/archive/compendium_ccc/documents/archive_2005_compendium-ccc_en.html#A%29%20COMMON%20PRAYERS