“Shantideva says that it is the very intention of harming us which makes the enemy very special. If the enemy had no intention of harming us, then we would not classify that person as an enemy, therefore our attitude would be completely different. It is his or her very intention of harming us which makes that person an enemy and because of that the enemy provides us with an opportunity to practice tolerance and patience. Therefore an enemy is indeed a precious teacher. By thinking along these lines you can eventually reduce the negative mental emotions, particularly hatred.”
elaborate?