Saint Leo the Great, Bishop of Rome, Doctor

Almighty God, who madest Saint Leo to be both the refuge of  the State, and also the bulwark of the Catholic Faith: Grant that the courage wherewith thou didst enable him to be stedfast in the evil day may be ours also in upholding the Christian standards which thou hast given us; through Jesus Christ our Lord. Amen.

¶ Or this:

O God, who didst strengthen thy holy Bishop Leo to contend  earnestly for the truth of thy Son’s sacred Humanity: Mercifully grant that we may be guided by the light of his teaching to believe rightly the Incarnation of our Lord Jesus Christ; who liveth and reigneth with thee and the Holy Ghost, ever one God, world without end. Amen.

¶ Or this:

Almighty, everlasting God, whose servant Leo steadfastly  confessed thy Son our Saviour Jesus Christ to be Very God and Very Man: Grant that we may hold fast to this faith, and evermore magnify his holy Name; through the same thy Son Jesus Christ our Lord, who liveth and reigneth with thee and the Holy Spirit ever, one God, world without end. Amen.