Commentators note the Hebrew word Ahimaaz uses for "bear tidings" is almost exclusively for good news. It is the same root often translated in the Greek Old Testament with the word that gives us "evangelize" or "gospel." Ahimaaz was eager to deliver what he saw as purely good news: God had given David victory. This highlights his focus on the national deliverance, overlooking the personal tragedy Joab knew would devastate the king.