Prayer before Mass / Collect for Purity

Deus, cui omne cor patet et omnis voluntas loquitur et nullum latet secretum, purifica per infusionem sancti spiritus cogitationes cordis nostri, ut perfecte te diligere et digne laudare mereamur.

     Corpus orationum no. 1135 (vol. 2, pp. 131-132), where the variants appear in an apparatus.

     c. 780:  "Previously known to Anglicans as the Collect for Purity, this prayer has been re-named to avoid any possible confusion with the collect of the service.  Its composition is attributed to St Gregory, Abbot of Canterbury c. 780. . . . It appears in the eleventh-century Leofric Missal, and in the Sarum rite it is part of the priest's private devotions before the start of the service" (Paul Bradshaw, Gordon Giles, and Simon Kershaw, "Holy Communion," chap. 6 in Companion to Common worship, ed. Paul Bradshaw, vol. 1, Alcuin Club Collections 78 (London:  SPCK, 2001), 110).  Attributed by whom?  An ancient source or the most recent scholarship?  By Lodovico Antonio Muratori (1672-1750), apparently.  Yet his Liturgia Romana vetus (1748), ii.383, though it contains this prayer, makes (on p. 383) no attribution to St. Gregory.  Cf. "This [Votive] Mass ['For Invoking the Grace of the Holy Spirit'] can be traced back to a little Sacramentary of Votive Masses put together by the Englishman Alcuin (d. 804), the great prime minister of Charlemagne and reviser of the Latin rite of the West.  Whether Alcuin composed th[is] Collect himself or took it from an older service book no longer extant is not known" (Massey Hamilton Shepherd, Jr., The Oxford American Prayer book commentary (New York:  Oxford University Press, 1950), 67).  Something similar is claimed by a note in The Leofric missal (below).  I have not followed up on this in the more recent scholarship to see why (say) Hatchett (in 1980) does not follow Shepherd here in locating this collect in the late 8th or very early 9th century at the latest, but speaks only of the 11th-century Leofric missal.  But Corpus orationum (below) should settle that question in favor of the early 9th in any case:

     9th century, first quarter (?):  No. 2325 in the texts complementary to the Gregorian sacramentary as edited by Deschusses (Le sacramentaire grégorien:  ses principales formes d'après les plus anciens manuscrits, vol. 2 (1979) or 3 (1982)), according to Corpus orationum no. 1135 (vol. 2, p. 131).

     9th-century, first half:  No. 1379 in the Tridentine sacramentary (Trent, Museo Provinciale d'Arte del Castello del Buonconsiglio 1590), as edited by Dell'Oro ("Sacramentarium Tridentium," in Monumenta liturgica Ecclesiae Tridentinae saeculo XIII antiquiora, Fontes liturgici, Libri sacramentorum II A (1985), pp. 73-416), according to Corpus orationum no. 1135 (vol. 2, p. 131).

     9th-century, last quarter:  No. 48 in the sacramentary of St. Martin of Tours (Tours, Bibl. mun. 184, and Paris, B.N. lat. 9430), as edited by Deschusses ("Les messes d'Alcuin," in Archiv für Liturgiewissenschaft 14 (1972):  7-41), according to Corpus orationum no. 1135 (vol. 2, p. 131).

     c. 975:  No. 1790 in the Fulda sacramentary (Göttingen, Königl. Universitätsbibliothek, Cod. theol. 231), as edited by Richter & Schönfelder (Sacramentarium Fuldense sæculi X (), p. 203), according to Corpus orationum no. 1135 (vol. 2, p. 131), and Bruylants n. 206 (Les oraisons du Missel Romain, vol. 1, p. 64).

     . . .

     1050/1072:  No. 177 in the Leofric missal (Oxford, Bodleiana 579 (2675)), as edited by Warren (The Leofric missal, as used in the Cathedral of Exeter during the episcopate of its first bishop, A.D. 1050-1072; together with some account of the Red book of Derby, the Missal of Robert of Jumièges, and a few other early ms. service books of the English church, ed. F. E. Warren (Oxford:  The Clarendon Press, 1883), 177):  "Deus, cui omne cor patet, et omnis uoluntas loquitur, et nullum latet secretum, purifica per infusionem sancti spiritus cogitationes cordis nostri, ut perfecte te diligere, et digne laudare mereamur.  Per.  In unitate eiusdem spiritus sancti."

     . . .

     14th century:  The clowde of unknowyng, Prologe:  God, unto Whom alle hertes ben open, and unto Whom alle wille spekith, and unto Whom no privé thing is hid: I beseche Thee so for to clense the entent of myn hert with the unspekable gift of Thi grace that I may parfiteliche love Thee, and worthilich preise Thee. Amen.

     _____:  Nos. 579 & 787 in the Sarum missal (first [printed] edition:  London, 1554), as edited by Dickinson (Missale ad usum insignis et praeclarae ecclesiae Sarum (1861-1863), and The Sarum missal, tr. [A. Harford Pearson] (1868; 2nd edn., 1884), 216, 401.

     1549:  Booke of the common prayer, as reproduced in The first and second prayer books of Edward VI, Everyman's Library 448 (London:  J. M. Dent & Sons Ltd.; New York:  E. P. Dutton & Co. Inc., 1910), 212:  "Almightie God, unto whom all hartes bee open, and all desyres knowen, and from whom no secretes are hid:  clense the thoughtes of our hartes, by the inspiracion of thy holy spirite:  that we may perfectly loue thee, and worthely magnifie thy holy name:  through Christ our Lorde.  Amen."

     1577:  Missale Romanum, p. 41.

     1559:  Book of common prayer (Cummings):  "Almighty God, unto whom al hartes be open, al desires knowen, and from whom no secretes are hyd:  clense the thoughtes of our hartes by the inspiracion of thy holy spirite, that we may perfectly love thee, and worthily magnify thy holy name, through Christe our Lorde.  Amen."

     1662:  Book of common prayer (Cummings):  "Almighty God, unto whom all hearts be open, all desires known, and from whom no secrets are hid; Cleanse the thoughts of our hearts by the inspiration of thy holy Spirit, that we may perfectly love thee, and worthily magnifie thy holy Name, through Christ our Lord.  Amen."

     1928:  Book of common prayer:  "Almighty God, unto whom all hearts are open, all desires known, and from whom no secrets are hid; Cleanse the thoughts of our hearts by the inspiration of thy Holy Spirit, that we may perfectly love thee, and worthily magnify thy holy Name; through Christ our Lord.  Amen."

     1959:  The Missal in Latin and English, being the text of the Missale Romanum with English rubrics and a new translation (New York:  Sheed & Ward, 1959), 663:  "Deus, cui omne cor patet et omnis volúntas lóquitur, et quem nullum latet secrétum:  purífica per infusiónem Sancti Spíritus cogitatiónes cordis nostri; ut te perfécte dilígere, et digne laudáre mereámur."  "O God, to whom all hearts are open, all desires known, and from whom no secrets are hid, cleanse the thoughts of our hearts by the inpouring of thy Holy Spirit, giving us grace to love thee perfectly and praise thee worthily."

     _____:  Roman missal:

     1979:  Book of common prayer, Rite I:  "Almighty God, unto whom all hearts are open, all desires known, and from whom no secrets are hid:  Cleanse the thoughts of our hearts by the inspiration of thy Holy Spirit, that we may perfectly love thee, and worthily magnify thy holy Name; through Christ our Lord.  Amen."

     1979:  Book of common prayer, Rite II:  "Almighty God, to you all hearts are open, all desires known, and from you no secrets are hid: Cleanse the thoughts of our hearts by the inspiration of your Holy Spirit, that we may perfectly love you, and worthily magnify thy holy Name; through Christ our Lord. Amen."

     _____:  Common worship:  

     2010:  Roman missal, revised (The CTS new daily missal: people's edition, with the new translation of the Mass (Catholic Truth Society, 2012), 929):  "O God, to whom every heart is open, every desire known and from whom no secrets are hidden; purify the thoughts of our hearts by the inspiration of your Holy Spirit, that we may perfectly love you, and worthily praise your holy name. Amen."