My experience as a pastor has been that those who are middle-class in spirit tend to be indifferent to the poor, but people who come to grasp the gospel of grace and become spiritually poor find their hearts gravitating toward the materially poor. To the degree that the gospel shapes your self-image, you will identify with those in need. You will see their tattered clothes and think: "All my righteousness is a filthy rag, but in Christ we can be clothed in his robes of righteousness." When you come upon those who are economically poor, you cannot say to them, "Pull yourself up by your bootstraps!" because you certainly did not do that spiritually. Jesus intervened for you. And you cannot say, "I won't help you because you got yourself into this mess," since God came to earth, moved into your spiritually poor neighborhood, as it were, and helped you even though your spiritual problems were your own fault. In other words, when Christians who understand the gospel see a poor person, they realize they are looking into a mirror. Their hearts must go out to him or her without an ounce of superiority or indifference.
Timothy Keller, Generous Justice