Consider the following:
We create cultural artifacts. That’s a very simple answer. The cultural mandate.
A more relevant answer is that every true, good and beautiful thing we do that is born from the Spirit of God, God is using in the re-making of creation. The basis is the resurrection of Jesus through the power of the Spirit. The resurrection is God’s act of redeeming not just “souls,” but the whole material creation. What God is now doing in and through the Church, is a proleptic foretaste of what He is doing in all creation. He begins with the human, and through the human (the new human race of which Christ is the Head), renews creation.
This is why our works shall follow us; what we do now will indeed echo in eternity. The good we do will in due time, become part of God’s new world. Every “good work” that is a true labour of Christ’s love, will find its way into God’s new world.
Easter Sunday, actually every Sunday, is the the day when the Father proclaims in Jesus’ resurrection through the Spirit, “Behold, I will create new heavens and a new earth.” (Isaiah 65:17). It begins with the “new humanity.” “Behold, if anyone be in Christ, He is a new creation.” On the basis of the resurrection, the Scripture thus reads, “Therefore, my dear brothers, stand firm. Let nothing move you. Always give yourselves fully to the work of the Lord, because you know that: your labour in the Lord is not in vain.”
Every “good work” that is a true labour of Christ’s love, will find its way into God’s new world, and our works in Christ through the Spirit will commend us before God’s throne; there will be reward given for running the race well. So we are partnering with God in re-making, or “re-wiring” of all creation in the space-time continuum. In doing so, we manifest through word and deed, signs of God’s coming kingdom.