Matthew 5:43 "You have heard that it was said, 'Love your neighbor and hate your enemy.' 44 But I tell you: Love your enemies and pray for those who persecute you, 45 that you may be sons of your Father in heaven. He causes his sun to rise on the evil and the good, and sends rain on the righteous and the unrighteous. 46 If you love those who love you, what reward will you get? Are not even the tax collectors doing that? 47 And if you greet only your brothers, what are you doing more than others? Do not even pagans do that? 48 Be perfect, therefore, as your heavenly Father is perfect.
God showed us mercy in that He loved us while we were still lost in our sin. Since God showed us mercy, we should be among the first to show mercy others who are lost.
When we were lost sheep, would we have been led to the Lord by an angry Christian or by one who lives out his or her faith? By living out our faith, we encourage and love others. Without love, we will never reach the world for Christ.
We must live out our faith with actions - loving even the unlovable. If we can master this, then we will follow our Lord because He loved the unlovable and lost.