How do we know that believers have a new nature?

The evidence of a believer's new nature is demonstrated in their spiritual awakening and an innate desire for righteousness and holiness. This transformation is a result of the regenerative work of the Holy Spirit, as expressed in Scripture, such as in Ezekiel 36:26, where God promises to give a new heart and spirit to His people. Paul elaborates on this change in 2 Corinthians 5:17, stating that 'if any man be in Christ, he is a new creature; old things are passed away; behold, all things are become new.' This new identity propels the believer to live in accordance with God's will, engaging in the ongoing conflict with sin, fueled by a genuine desire to please God. The presence of this new nature also equips the believer to mortify the deeds of the flesh as they seek to glorify Christ in their daily lives.