What does the Bible say about new creation in Christ?

The concept of being a new creation in Christ is primarily rooted in 2 Corinthians 5:17-18, which declares that 'if anyone is in Christ, he is a new creature; the old has passed away; behold, the new has come.' This transformation is a direct result of Christ’s work of reconciliation, whereby He has put away our sins and inaugurated a new life for His people. It signifies a fundamental change in the believer's identity and nature, moving from the old self to the new self, created in righteousness and holiness. This new birth is essential for experiencing the fullness of relationship with God, as it allows the believer to partake in the blessings of salvation and live in a manner that glorifies Him.