It is usually not difficult to love close friends and family members. And it's usually not tough to show a bit of compassion to desperate, pitiable people in crisis. But what about mean people or heartless enemies? What about loving the very people who have hurt and wronged you?
That's the unexpected power of the gospel of Christ. When Jesus invades our lives, he replaces (if we allow Him) our natural tendencies toward bitterness and revenge with the unnatural (supernatural) ability to treat others with mercy and grace. This is how Jesus lived. So when He lives within us, it is how we can and should live.