The Jews gloried in the fact that they had God’s Word unlike the rest of the world. But they did not live according to that Word; and they finally rejected the One about Whom God’s Word had prophesied, when He came into their midst. It is possible for those of us who have understood the new covenant also to glory in a similar way and to deceive ourselves.
The following is an adaptation of Romans Chapter 2 (from the Living Bible) – adapted to the danger we face:
You may be saying, “How sad it is that so many Christians have not understood the new covenant that we have understood so clearly”.
But wait! Examine your life honestly and see if it is better than the lives of those other Christians who have notunderstood the new covenant. Are you perhaps boasting only in a theoretical knowledge of the new covenant? Or have you actually entered into the new-covenant life?