The world cannot be Christ's Kingdom

"A society avouching Christ to be head and king of it, furnished with worldly power for defending his truths and institutions, and associated for defending his interest, and their profession of subjection to him, by the sword, is undoubtedly a kingdom of this world, by our Lord's description of a kingdom of this world: for it agrees with our Lord's account of such a kingdom, in that whereby it is distinguished from his kingdom. Let it be what it will then, his kingdom it is not. And such association is plainly cross to this testimony of our Lord concerning his kingdom." - John Glas, King of Martyrs, The Works of John Glas, pg. 97

There is a distinction between Christ's people and the world

"The true profession of Christ's truth, and all his commands and institutions, will always, one way or other, cross our worldly interest: 'For all that will live godly in him, must suffer.' And it is a vain thing to think to hold him and our worldly interest together: 'No man can serve two masters,' 2 Tim 3. 12, Rev 12.17." -John Glas, King of Martyrs, In The works of John Glas, pg. 94

Wether the governing rulers are good or evil we are to be submissive

"In considering the duties enjoined in the apostolic Epistles, it is constantly to be kept in view that, while written on particular occasions, and addressed to particular churches, they are equally adapted, in the wisdom of God, to all times and circumstances. They are intended for the instruction and guidance of Christians in every country and every age, just as the Decalogue, though delivered to only one nation, and that only once, is binding on every nation under heaven, in every period, till ths end of time. Christians learn from at present from this passage the will of God respecting their duty to civil government, just as those to whom this Epistle was addressed. It is true that there is an innumerable variety of differences in circumstances; but this is nothing to the purpose. The things taught in these Epistles are in all circumstances duty. The Roman Christians were under a despotism, and those who read this Epistle may live under a free government. But the dury of obedience is in both cases the same. The powers are under both equally to be obeyed." -Robert Haldane, Exposition of the Epistle to the Romans, pg. 576