"without thee we are not able to please thee"

Vat. Reg. lat. 316, fol. 178v

"May the working of your mercy, O Lord, we pray, direct our hearts aright, for without your grace we cannot find favor in your sight.  Through".

"Dirigat corda nostra, quaesumus, Domine, tuae miserationis operatio, quia tibi sine te placere non possumus."

My translation: 

May the work of your compassion, O Lord we pray, set our hearts in order, because without you we cannot please you.

     Prayer for Saturday of the Fourth Week of Lent, Liturgia horarum.  =Corpus orationum no. 2234, going back to the mid-8th-century Gelasian Sacramentary (Vat. Reg. lat. 316, fol. 178v, representing mid-7th-century practice) at least. 

BCP 1549:

"O GOD, for asmuche as without thee, we are not able to please thee; Graunte that the workyng of thy mercie maye in all thynges directe and rule our heartes; Through".

BCP 1662:

"O God, forasmuch as without thee we are not able to please thee; Mercifully grant, that thy Holy Spirit may in all things direct and rule our hearts; through".

BCP 1979:

"O God, forasmuch as without thee we are not able to please thee, mercifully grant that thy Holy Spirit may in all things direct and rule our hearts; through".

"O God, because without you we are not able to please you, mercifully grant that thy Holy Spirit may in all things direct and rule our hearts; through".