Keller makes the rhetorical point that we need to apply the gospel both to wordly sinfulness and religious sinfulness - "to good people and bad people". That's very helpful. He says "There are actually three ways to live".
It's a helpful reminder, but it's not ultimately true. That's obvious, but sometimes we don't realise the obvious when we hear a powerful speaker say something.
So there you go. Religion is really a subset of rebellion against God.
So there are really only two ways to live: continue in our rebellion against God and face his wrath, or submit to Jesus as Lord and trust in him for eternal salvation.