In his marvelous book, The Reason for God, Tim Keller writes:
Each year at Easter I get to preach on the Resurrection. In my sermon I always say to my skeptical, secular friends that, even if they can’t believe in the resurrection, they should want it to be true. Most of them care deeply about justice for the poor, alleviating hunger and disease, and caring for the environment. Yet many of them believe that the material world was caused by accident and that the world and everything in it will eventually simply burn up in the death of the sun. They find it discouraging that so few people care about justice without realizing that their own worldview undermines any motivation to make the world a better place. Why sacrifice for the needs of others if in the end nothing we do will make any difference? If the resurrection of Jesus happened, however, that means there’s infinite hope and reason to pour ourselves out for the needs of the world.