2 Corinthians 5: 17-19 (NIV) 17 Therefore, if anyone is in Christ, the new creation has come: The old has gone, the new is here! 18 All this is from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation: 19 that God was reconciling the world to himself in Christ, not counting people’s sins against them. And he has committed to us the message of reconciliation.
Sometimes in preparation for buying something brand new, I get rid of the old things. The discovery is recognizing that the old things are not useful or beneficial. The appropriate action to the old things is getting rid of it.
When we become a new creation in Christ, we discover that the old lifestyle without Christ did not glorify God. Also because of being “brand new” creations in Christ, we have eternal life with God. There are no benefits in trying to hold on to the old. We are not a slave to sin, since we have been reconciled.