Indeed, personal regeneration is key to understanding God’s plans for the earth and the heavens. It is the inbreaking of God’s new creation (2 Cor. 4:6) in the present order. God demonstrates in individual lives what he one day plans to do with the entire universe, the age of the Spirit. This is why Jesus speaks of the consummated kingdom in the age to come as the regeneration (Matt. 19:28), and why he insists that personal regeneration is necessary to see the kingdom of God (John 3:3). God redeems individuals, transforming them through the Spirit because through the redeemed human rulers, the sons of God, he will transform the creation itself, freeing it from its bondage to decay (Rom. 8:18-23). This is why the redeemed groan along with the creation itself for the consummation of the kingdom (Rom. 8:23). It is here in the regeneration that the personal and the cosmic aspects of eschatology meet.
Russel D. Moore in A Theology for the Church.