Saint Augustine of Hippo

O God, who from among the people of Africa didst raise up thy servant Augustine to be a Bishop and Doctor of the Church: Grant us so to follow him in paths of penitence and discipline that we may attain to the vision of thy glorious Godhead; through Jesus Christ our Lord, who liveth and reigneth with thee in the unity of the Holy Ghost, ever one God, world without end. Amen.

¶ Or this:

O God, who gavest the blessed Augustine to be a Doctor of thy Church and an exponent of the mysteries of Holy Scripture: Grant that we, being instructed by his faithful teaching, may be strengthened to hold fast the catholic faith: through Jesus Christ our Lord. Amen.