Collect for Purity

The Collect for Purity stands at the very beginning of the Anglican Holy Communion service, spoken before any other prayer, before the Kyrie, before the Gloria — as the first words of the congregation's approach to the Eucharist. Its position is deliberate and theologically freighted: before we can offer anything to God, we must acknowledge that God already knows everything about us, and we must ask for the cleansing that alone makes genuine worship possible. The prayer originated in medieval Latin liturgy, where it appeared as a private preparatory prayer for the priest before celebrating Mass. The Latin text, beginning "Deus cui omne cor patet" ("O God, to whom every heart lies open"), appears in the Sarum Rite and other pre-Reformation English uses, where it was part of the priest's private preparation at the foot of the altar — not spoken aloud to the congregation. Thomas Cranmer's translation and placement transformed it: by moving it to the beginning of the public service and putting it in the first person plural ("our hearts," "we may perfectly love"), Cranmer made it a corporate act of preparation for all present, not a private clerical devotion. Cranmer's translation, produced for the first Book of Common Prayer in 1549, is a masterpiece of English liturgical prose. The three parallel relative clauses that open the prayer — "unto whom all hearts are open, all desires known, and from whom no secrets are hid" — establish immediately a posture of radical transparency before God. There is no point in concealment; God knows everything. The effect is not crushing but liberating: if God already knows everything and still invites us to his table, then the only honest response is to ask for cleansing, not to pretend to a purity we do not possess. The phrase "inspiration of thy Holy Spirit" carries both its modern English sense (to inspire, to breathe life into) and its Latin root (inspiratio, an inbreathing). The prayer asks God to breathe the Spirit into our thoughts as preparation for worship — an image drawn from Genesis 2:7, where God breathes life into Adam, and from John 20:22, where the risen Christ breathes the Holy Spirit on the disciples. What is asked is not merely moral improvement but a new act of divine creation in the inner life. The theological background draws on Psalm 51, the great penitential psalm of David: "Create in me a clean heart, O God; and renew a right spirit within me" (Psalm 51:10). The Collect for Purity is in essence a eucharistic version of that verse. It also resonates with 1 John 3:2-3: "We know that, when he shall appear, we shall be like him; for we shall see him as he is. And every man that hath this hope in him purifieth himself, even as he is pure." The goal of purification in the Collect is the same as in John's letter: to see God truly and to love him rightly. The two purposes stated in the prayer — "that we may perfectly love thee, and worthily magnify thy holy Name" — correspond to the two dimensions of worship: the inward (love) and the outward (magnification, i.e., praise). These cannot be separated. Magnification without love is performance; love without expression in worship is incomplete. The prayer holds both together as the integrated goal of purified worship. The Collect for Purity has appeared in every edition of the Book of Common Prayer from 1549 to the present, including the 1662 revision, the American 1928 and 1979 prayer books, and the 2019 Anglican Church in North America prayer book. Its durability across nearly five centuries of theological controversy, political upheaval, and liturgical revision speaks to its perceived indispensability. Even those who might dispute other aspects of Anglican liturgy have rarely questioned this prayer's right to stand at the door of the Eucharist. In the 1979 American Book of Common Prayer, the Collect for Purity remains an option at the opening of Rite I and Rite II Eucharist. Some congregations have moved it or made it optional, but many clergy and congregations regard its omission as a loss — a stripping away of the humility that should precede all worship. The prayer has also migrated beyond Anglican use. Methodist, Lutheran, and some Presbyterian congregations have adopted it for their own communion services. Its compact theology — acknowledgment of divine omniscience, request for interior cleansing, aspiration toward perfect love and worthy praise — translates across denominational boundaries. Among Cranmer's liturgical compositions, the Collect for Purity represents his technique at its most refined: taking a medieval original and transforming it through rhythm, parallelism, and English diction into something at once ancient and entirely of its time. The prayer is fifty-three words in its standard text — an economy that achieves more theological depth than many sermons.

The Collect for Purity is formally a preparatory prayer — it is prayed before the main act of worship rather than as the main act itself. This preparatory function is worth preserving even in private devotion. Praying it before Bible reading, before any act of worship, or before receiving communion aligns the heart with its original intention. The opening clauses deserve slow attention: "unto whom all hearts are open, all desires known, and from whom no secrets are hid." Before asking for anything, these words invite a moment of honest self-examination. What desires am I bringing to this moment of prayer or worship? What is actually going on in my inner life right now? The prayer does not ask you to confess these things explicitly — only to acknowledge that God already knows them. This acknowledgment itself is an act of honesty that prepares the heart for genuine prayer. The request for cleansing — "Cleanse the thoughts of our hearts by the inspiration of thy Holy Spirit" — can be prayed as a simple opening of oneself to the Spirit before reading Scripture or entering corporate worship. It is an acknowledgment that we cannot purify ourselves, that the cleansing must come from outside us, and that God has promised that cleansing to those who ask. The final clauses state two aspirations: perfect love and worthy magnification of God's name. These can become personal prayer points. "Perfect love" — in what area of my life is my love for God or for others imperfect, distorted, or absent? "Worthily magnify" — how can my words, my actions, my worship today truly honor who God is, rather than merely going through motions? In liturgical use, the collect is typically said or sung by the presiding minister, with the congregation responding "Amen." In private use, the plural pronouns — "our hearts," "we may perfectly love" — are a reminder that even solitary prayer participates in the corporate Body of Christ. You are never praying alone. Some Christians use the Collect for Purity as a morning prayer, setting the intention of the whole day under the aspiration to love God perfectly and honor his name worthily. Prayed at the start of each day, it functions as a continuous act of consecration: every day offered to God with honest acknowledgment of our need for his Spirit's work.