For the Defense of Christ’s Church

O Lord,
keep your Church and household continually in your true religion,
that all who lean on the hope of your heavenly grace alone
may always be defended by your mighty power;
through Jesus Christ our Lord. Amen.

Source: Gregorian Sacramentary

Source of this version: Freely modified from Prayers of the Early Church, edited by J. Manning Potts, 1953