O God, our true Life, in whom and by whom all things live, Thou commandest us to seek Thee, and art ready to be found; Thou biddest us knock, and openest when we do so. To know Thee is life, to serve Thee is freedom, to enjoy Thee is a kingdom, to praise Thee is the joy and happiness of the soul. I praise, and bless, and adore Thee, I worship Thee, I glorify Thee, I give thanks to Thee for Thy great glory. I humbly beseech Thee to abide with me, to reign in me, to make this heart of mine a holy temple, a fit habitation for Thy Divine majesty. O Thou Maker and Preserver of all things, visible and invisible! keep, I beseech Thee, the work of Thine own hands, who trusts in Thy mercy alone for safety and protection. Guard me with the power of Thy grace, here and in all places, now and at all times, forevermore—Amen.

St. Augustine (354–430).