St. Leo the Great Sermon 24 VI. Christians must cling to the one Faith and not be led astray

But you, dearly beloved, whom I address in no less earnest terms than those of the blessed Apostle Peter, a chosen race, a royal priesthood, a holy nation, a people for God's own possession 1 Peter 2:9, built upon the impregnable rock, Christ, and joined to the Lord our Saviour...See more