A gospel is an announcement of something that has happened in history, something that’s been done for you that changes your status forever. Right there you can see the difference between Christianity and all other religions, including no religion. The essence of other religions is advice; Christianity is essentially news. Other religions say, ‘This is what you have to do in order to connect to God forever; this is how you have to live in order to earn you way to God.’ But the gospel says, ‘This is what has been done in history. This is how Jesus lived and died to earn the way to God for you.’ Christianity is completely different. It’s joyful news.
– Tim Keller