Books certainly teach us great lessons and here is one lesson I really like from Getting To Yes With Yourself by William Ury.
On one occasion in the White House when Lincoln was speaking sympathetically of the plight of the South, a Yankee patriot took him to task. “Mr. President,” she decried, “how dare you speak kindly of our enemies when you ought to he thinking of destroying them?” Lincoln paused and addressed the angry patriot: “Madam,” he asked, “do I not destroy my enemies when I turn them into my friends”
On this William commented that:
Taking a lesson from Lincoln, we might look around and ask ourselves if there are any “enemies” in our lives whom we can “destroy” by turning them into our friends.
I believe the lesson speaks for itself.