Angel of strength, friend of mankind! continue thy ministry of aiding us. We are surrounded by terrible enemies: our weakness makes them bold; come to our assistance, procure us courage. Pray for us during these days of conversion and penance. Obtain for us the knowledge of all we owe to God in consequence of that ineffable mystery of the Incarnation, of which thou wast the first witness. We have offended Him: enlighten us, that so, henceforth, we may be faithful to His teachings and examples. Raise up our thoughts to the happy abode where thou dwellest; assist us to merit the places left vacant by the fallen angels, for God has reserved them for His elect among men.
Pray, O Gabriel, for the Church militant, and defend her against the attacks of hell. The times are evil; the spirits of malice are let loose, nor can we make stand against them, unless with God’s help. It is by His holy angels that He gives victory to His bride. Be thou, O strength of God! foremost in the ranks. Drive heresy back, keep schism down, foil the false wisdom of men, frustrate the policy of the world, arouse the well-minded from apathy; that over the earth He has redeemed, and that we may sing together with thee and the whole angelic choir: ‘Glory be to God, peace to men!’
–Dom Prosper Gueranger