As I always say, you can’t get too much of the Gospel. Below is an excerpt from Tullian Tchividjian’s blog quoting Tim Keller:
Paul is showing that we never “get beyond the gospel” in our Christian life to something more “advanced”. The gospel is not the first “step” in a “stairway” of truths, rather, it is more like the “hub” in a “wheel” of truth. The gospel is not just the A-B-C’s but the A to Z of Christianity. The gospel is not just the minimum required doctrine necessary to enter the kingdom, but the way we make all progress in the kingdom.