Misinterpretations often detach the verse from its wartime context, treating it as generic motivational advice for any personal challenge or competition without regard for God's purposes, or as a call to reckless aggression and nationalism that overrides wisdom and justice; some twist it to endorse offensive wars or political crusades, neglecting Joab's emphasis on defensive duty and ultimate deference to what 'the Lord do that which seemeth him good.'
II Samuel 10:12
King James Version (1769)
12 Be of good courage, and let us play the men for our people, and for the cities of our God: and the Lord do that which seemeth him good.
Joab encourages his brother Abishai to show courage and fight valiantly for their people and the cities of God amid a dire battle against superior forces, while entrusting the outcome to God's sovereign will, highlighting the importance of bold faith, loyalty to God's covenant community, and humble submission to divine providence over self-reliance.