The Universal Kingdom of God and the Mediatorial Kingdom of God

Will believers one day float on a cloud, play the harp and basically be bored? This secular depiction of the “kingdom” is popular, but of course, it is utterly false. This is not the kingdom that Christ says we must seek first (cf. Mat 6:33). Teaching about the doctrine of the kingdom is important; it was the central theme of Christ’s ministry during his first coming (cf. Mat 4:17, 23; 9:35; 10:5-7). Jesus did not refer to an abstract, over-spiritualized kingdom. So important is the doctrine of the kingdom, that Jesus again taught his apostles ‘about the things of the kingdom of God’ during the 40 days before his ascension (Acts 1:3). How can the kingdom of God be understood, and to which kingdom did Jesus refer to in the Gospels?

The Kingdom is in Your Midst

In Luke’s second book, the apostles asked the Lord when He will restore the kingdom to Israel, thereby implying that the kingdom had not yet been restored to Israel at that time (cf. Acts 1:6). Jesus answered his apostles, saying it is ‘not for you to know times or epochs which the Father has fixed by His own authority’ (Acts 1:7; NASB). In Luke’s first book, the Pharisees asked Jesus something quite similar, namely when the kingdom of God was coming. Jesus answered the Pharisees, saying that the ‘kingdom of God is not coming with signs to be observed; nor will they say, ‘Look, here it is!’ or, ‘There it is!’ For behold, the kingdom of God is in your midst” (Luk 17:20-21; NASB; cf. HCSB, ESV). How can Luke 17:20-21 be understood?