Life in the Spirit: The First-Fruits of the Heavenly State
"The New Testament, by spiritualizing the entire Messianic circle of ideas, becomes keenly alive to its affinity to the content of the highest eternal hope, and consequently tends to identify the two, to find the age to come anticipated in the present. In some cases this assumes explicit shape in the belief that great eschatological transactions have already begun to take place, and that believers have already attained to at least partial enjoyment of eschatological privileges. Thus the present kingdom in our Lord's teaching is one in essence with the final kingdom; according to the discourses in John eternal life is in principle realized here; with Paul there has been a prelude to the last judgment and resurrection in the death and resurrection of Christ, and the life in the Spirit is the first-fruits of the heavenly state to come." -- Geerhardus Vos, "The Eschatology of the New Testament"