…where there is neither Greek nor Jew, circumcised nor uncircumcised, barbarian, Scythian, slave nor free, but Christ is all and in all. – Colossians 3:11

Observe, “there is neither Greek nor Jew, circumcision nor uncircumcision, barbarian, Scythian, bond nor free,” in the new creation, but “Christ is all, and in all.” In the new world there is no difference between Jew and Gentile; barbarian simplicity and Greek cultivation are as nothing. I suppose as long as we are in the flesh we shall set some store by our nationality, and like Paul shall somewhat glory that we were free born but surely the less of this the better. Within the gates of the Christian church we are cosmopolitan, or rather we are citizens of the New Jerusalem only. As a man, I rejoice that I am an Englishman, but not with the same holy joy which fills me when I remember that I am a Christian. When I meet another man who fears God, I do not want him to think me an Englishman, nor do I desire to regard him as an American, a Frenchman, or a Dutchman; for we are no longer strangers and foreigners but fellow-citizens. If any man be a Christian and a foreigner after the flesh, he is yet in spirit ten thousand times more allied to me than if he were an Englishman and an unbeliever. Greatly is it to be deplored whenever the convulsions of nations drag Christian men into opposition to one another on the ground of politics. One part of the body of Christ cannot be at war with another. It is a shameful thing whenever we suffer our earthly nationality to dominate over our heavenly citizenship. Queen Victoria and President Grant are well enough in their places, but King Jesus is Lord of all; we are above all things subjects of His Imperial Highness the Prince of Peace. Nobody comes into the church as a Jew or a Gentile, nor does he remain there as a Greek or a Scythian, whatever he may have been before; when he becomes a Christian, Christ is all. Earthly distinctions of rank, if they still exist, as they must while we are in this world, are brought to a minimum; within the church they are almost obliterated, and what remains is sanctified to sacred ends. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1006.cfm