It is considered praiseworthy to say the following prayer, kneeling, in preparation for the Office. By local custom, it may be said either privately, or in unison by the whole Choir, but in a low tone of voice.
Ante Divinum Officium
Aperi, Dómine, os meum ad benedicéndum nomen sanctum tuum: munda quoque cor meum ab ómnibus vanis, pervérsis et aliénis cogitatiónibus; intelléctum illúmina, afféctum inflámma, ut digne, atténte ac devóte hoc Offícium recitáre váleam, et exaudíri mérear ante conspéctum divínæ Majestátis tuæ. Per Christum Dóminum nostrum. Amen.
Dómine, in unióne illíus divínæ intentiónis, qua ipse in terris laudes Deo persolvísti, has tibi Horas (vel hanc tibi Horam) persólvo.
Prayer before Office
Open, O Lord, my mouth to bless thy holy Name; cleanse also my heart from all vain, evil, and wandering thoughts; enlighten my understanding and kindle my affections; that I may worthily, attentively, and devoutly say this Office, and so be meet to be heard before the presence of thy divine Majesty. Through Christ our Lord. Amen.
O Lord, in union with that divine intention wherewith thou, whilst here on earth, didst render praises unto God, I desire to offer this my Office of prayer unto thee.
