What does the Bible say about zeal without armor?

In the context of 2 Samuel 2, Asahel's zeal in pursuing Abner represents a common spiritual condition. He was fervent and determined, yet his lack of understanding and wisdom led to his tragic end. Just as Asahel pursued the glory of victory in his own strength, many today attempt to pursue righteousness through their own efforts without the necessary understanding of the gospel and God's provision in Christ. Our zeal must be informed by knowledge of God's righteousness, as seen in Romans 10:2-3, where Paul speaks of the Israelites' zeal that was not according to knowledge, highlighting the need to understand our dependence on Christ for righteousness.