We live in a day when we are being reminded again and again of our temporal privileges and responsibilities as Christians: we enjoy abundant life now, and we must remember to help the poor, seek justice for all, insist on integrity and demonstrate it ourselves. Such reminders are important, precisely because it is possible in a superficial sense to be heavenly minded yet morally and socially useless. At the same time, Christians must avoid identifying the goals of the kingdom of God with political, economic, or social goals; or, more accurately, such identification must never be exclusive. Just as the kingdom of Jesus Christ is not of this world (18:36), so also is it not restricted to this world. Our ultimate goal is not the transformation of society, as valuable as that may be. Our ultimate goal is pure worship in the unrestricted presence of God.
That perspective, and that perspective alone, is powerful enough to call forth our unqualified obedience. Such an eternal vantage point enables us to be more useful in our society than we would be otherwise; for, following an exalted Master, we learn something of service while walking in self-denial that eschews personal empire-building. Empire-building is so common a temptation for idealists that today’s revolutionaries commonly become tomorrow’s tyrants. The Christian has the potential to escape this snare, for his highest goal transcends the merely temporal. He magnifies integrity coupled with meekness because he recognizes that such graces are gifts from the Master who exemplified them.
D.A. Carson, The Farewell Discourse and Final Prayer of Jesus