There is this identification of the kingship of God with the indwelling and the presence of the Holy Spirit. …So we have this foretaste of the kingdom in the church. That’s why many of our church fathers would simply say that the church is the kingdom of god, by faith and grace and the sacraments. Not the members or the Holy Synod or the Patriarchates or stuff like that, not the institutions but the content of church as a mystical reality is the presence of God’s kingdom in this age through the Holy Spirit where Christ is reigning.
…You have a much greater revolution going on here! And here the battle cry of that revolution is the Magnificat of Mary. …This kingdom is going to come on earth through the slave of God … who is Mary’s child. It’s a very political statement. …This whole thing has got to be on this earth, but it’s got to be the kingdom that is not of this earth that is of the God who is love.
Fr. Thomas Hopko speaking in a ten-part lecture series about the Lord’s Prayer (two paragraphs from separate lectures and in reverse order).