What Is The Gospel Meant To Be?

Last week, I asked the question:  "Can we overemphasize the gospel?"  Hundreds have considered this question, and a number have weighed in on the issue.  One reader in particular, Russ, ended his comments by asking:  "What is the gospel scripturally meant to be?"  I posed the question back to him, and here's what he said:

I do not know in full.  The scriptures you provided were a good and proper start.  I think that in some sense, the gospel is to function as our everything.  Or to borrow...