How do we know the doctrine of dual natures in believers is true?

The existence of dual natures in believers is a biblical concept reiterated in Romans 7, where Paul describes his struggle between the flesh and the Spirit. This tension illustrates the reality of the old nature, rooted in sin, and the new nature, born of the Spirit. The raven symbolizes the old nature that can live off of death, while the dove symbolizes the new nature that can only find rest in Christ. This duality confirms that believers experience conflict as they navigate both natures in their lives.