Here is a long-promised post for friends who are not yet Christian but have come to respect its principles and influence. Somehow, Christianity has suddenly become worth talking about again. Celebrities are coming out as believers. Podcasters and bloggers are voicing concerns that Western society has made a mistake by abandoning its religious heritage. Agnostics and atheists are conceding that the Christian belief might confer some existential benefits after all, with its call to love and forgive. Some wistfully wish they could believe but feel that they just can’t. It is possible to go deeper. There are things you can do, and there are promises that God has given you.…