In virtute tua, Domine laetabitur justus: et super salutare tuum exsultabit vehementer: desiderium animae ejus tribuisti ei. * Quoniam praevenisti eum in bendictionibus dulcedinis: posuisti in capite ejus coronam de lapide pretioso.
In Thy strength, O Lord, the just man shall joy and in Thy salvation he shall rejoice exceedingly: Thou hast given him his heart's desire. For Thou hast prevented him with blessing of sweetness: Thou hast set on his head a crown of precious stones.
(Psalm 20:2-3,4 from the Introit of Mass)
Grant, we beseech Thee, O almighty God, that we who celebrate the festival of blessed Christopher, Thy martyr, may by his intercession be strengthened in the love of Thy name.
From the Catholic Encyclopaedia: http://www.newadvent.org/cathen/03728a.htm