Answer: The new creation is described in 2 Corinthians 5:17: “Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come!” The word “therefore” refers us back to verses 14-16 where Paul tells us that all believers have died with Christ and no longer live for themselves. Our lives are no longer worldly; they are now spiritual. Our “death” is that of the old sin nature which was nailed to the cross with Christ. It was buried with Him, and just as He was raised up by the Father, so are we raised up to “walk in newness of life” (Romans 6:4). That new person that was raised up is what Paul refers to in 2 Corinthians 5:17 as the “new creation.”
To understand the new creation, first we must grasp that it is in fact a creation, something created by God. John 1:13 tells us that this new birth was brought about by the will of God. We did not inherit the new nature, nor did we decide to re-create ourselves anew, nor did God simply clean up our old nature; He created something entirely fresh and unique. The new creation is completely new, brought about from nothing, just as the whole universe was created by God ex nihilo, from nothing. Only the Creator could accomplish such a feat.
Second, “old things have passed away.” The “old” refers to everything that is part of our old nature—natural pride, love of sin, reliance on works, and our former opinions, habits and passions. Most significantly, what we loved has passed away, especially the supreme love of self and with it self-righteousness, self-promotion, and self-justification. The new creature looks outwardly toward Christ instead of inwardly toward self. The old things died, nailed to the cross with our sin nature.
Read more:
What does it mean that a Christian is a new creation (2 Corinthians 5:17)?