The O Antiphon: O King of all nations and keystone of the Church
One significant challenge for the early Church was how to treat Gentile, non-Jewish converts to Christianity. It required the original apostles and early disciples to radically re-think the mission of Jesus and the Kingdom of God. The Messiah was to be a king not just for the Jewish people, but for all people. God wills salvation for everyone, not just a select few.