What is the Gospel?

There has been a lot of commenting on my blog this week that has included the words "gospel of Christ." Some have defined it very specifically. Others have strongly listed what the gospel is not. So I'm curious, what do you think the gospel is?

Oh, by the way, I want your answer in 280 characters or less (twice the length of Twitter). If you want, include a hyperlink that explains your definition more extensively. If you agree with a definition someone else gives, I'd love to know that also.

What is the gospel (in 280 characters or less)?

Go.