If a brother or sister is poorly clothed and lacking in daily food, and one of you says to them, "Go in peace, be warmed and filled," without giving them the things needed for the body, what good is that? (James 2:15-16, emphasis added).
I've already linked to a couple of messages by Tim Keller on doing justice. Here is one more of his messages: Blessed Are the Poor. The basic theme of the message is this: The gospel is an agent in knowing (understanding) the poor, becoming the poor and loving the poor.