Almighty, eternal God,
you choose what the world considers weak
to put the worldly power to shame.
May we who celebrate the birth of Saint Agnes into eternal joy
be loyal to the faith she professed. . . .
Prayer for the Feast of St. Agnes (21 January), Liturgy of the hours. My stab at this:
Almighty [and] eternal God,
you who choose the weak of the world
in order that you might confound all the strong,
grant, gracious [God], that we who celebrate the birthday festivities of your martyr blessed Agnes
may imitate her [steadfast] perseverence in the faith. . . .
Omnípotens sempitérne Deus,
qui infírma mundi éligis
ut fórtia quæque confúndas,
concéde propítius, ut, qui beátæ Agnétis mártyris tuæ natalícia celebrámus,
eius in fide constántiam subsequámur. . . .