Tim Keller on "Good News"

I'm reading King's Cross by Tim Keller, and thanking God for every chapter. It's one of the better books I've read in a while, and is really an encouragement for my faith.

Keller says the following about the Gospel being "good news." Praise God for pastors and theologians who speak like this:

Gospel means "news that brings joy." This word had currency when Mark used it, but it wasn't religious currency. It meant history-making, life-shaping news, as opposed to just daily news [...] A gospel was news of some event that changed things in a meaningful way [...] When Greece was invaded by Persia and the Greeks won the great battles of Marathon and Solnus, they sent heralds (or evangelists) who proclaimed the good news to the cities: "We have fought for you, we have won, and now you're no longer slaves; you're free."

[T]he gospel is not about choosing to follow advice, it's about being called to follow a King. Not just someone with the power and authority to tell you what needs to be done - but someone with the power and authority to do what needs to be done, and then to offer it to you as good news.