What does the Bible say about the war within us?

In Romans 7, Paul explains the struggle within Christians, depicting it as a civil war between two natures: the old nature inherited from Adam and the new nature that is born from God. This internal conflict reveals itself through thoughts and actions that are at odds with God's law, leading believers to hate the sin within them even while they struggle against it. The law highlights our sinful nature, provoking God’s children to see their deep need for grace and deliverance through Christ.