Why is recognizing the two natures in believers important?

The recognition of the two natures — the old nature and the new nature — in believers is crucial to grasping the doctrine of regeneration and the experiences of sanctification. When someone is born again, they simultaneously possess an old sinful nature and a new holy nature. This duality is what enables believers to experience genuine conflict over sin, as exemplified by Paul in Romans 7:14-25. Without acknowledging these two natures, one risks misunderstanding the nature of sin and the hope found in Christ's redemption, since the old man does not improve but must be put to death.