Below is an article written by Tullian Tchividjian about this exact same point. It is my prayer that the students of Lone Oak FBC would learn this and grow in this understanding of the what the Gospel truly means for believers.
Ionce assumed the gospel was simply what non-Christians must believe in order to be saved, while afterward we advance to deeper theological waters. But I’ve come to realize that ” the gospel isn’t the first step in a stairway of truths, but more like the hub in a wheel of truth.” In other words, once God rescues sinners, his plan isn’t to steer them beyond the gospel, but to move them more deeply into it. All good theology, in fact, is an exposition of the gospel.
In his letter to the Christians of Colossae, the apostle Paul portrays the gospel as the instrument of all continued growth and spiritual progress, even after a believer’s conversion.
“All over the world,” he writes, “this gospel is bearing fruit and growing, just as it has been doing among you since the day you heard it and understood God’s grace in all its truth” (Col. 1:6). He means that the gospel is not only growing wider in the world but it’s also growing deeper in Christians.