Agobard of Lyon (Letter to Emperor Louis I about the Holy Roman Empire c 817)
There is neither gentile nor Jew, barbarian nor scythian, Aquitanian nor Lombard, Burgundian nor Alaman, slave nor free. All are one in Christ and Christ is all… For it often happens that five men walk or sit together, and no one of them has a law in common with another, as far as external and earthly things are concerned, while in everlasting things they are bound by the one law of Christ. (Letter to Emperor Louis I about the Holy Roman Empire c 817)