The Consequences of Joab’s Sin
Joab, the commander of David’s army, lost his brother Asahel in the fighting against Abner. Without David’s permission, he called Abner back as he was returning home and killed him. David mourned and had the people walk behind the bier, yet he did not call Joab to account for his sin and left the judgment to God.
Joab had rendered David great service, but he grew proud, crediting what he had achieved to his own strength. Abner, too, made much of his part in setting Ish-bosheth on the throne, went so far as to threaten the king, and in the end was killed by Joab. Both men knew the will of God, yet went against it for the sake of their own selfish desires.
God used even Joab’s flawed abilities for David’s sake, but because Joab never repented, judgment came upon him in later years. David, by contrast, had the power to avenge himself, yet he obeyed and entrusted vengeance to God, and as a result he was established as king over a united kingdom. Wisdom lies in not treating God’s grace as one’s own, and in trusting God whatever may come.