The folks who like to draw attention to obedience in the Christian life do not seem to consider the source of believer’s comfort. Consider the following:
Since the Bible doesn’t restrict the word “gospel” to a very precise meaning, we shouldn’t either. This is not to say that we can’t use the gospel in its narrow sense and distinguish between the gospel (what Jesus has done) and our response to the gospel (what we need to do). To do so is to distinguish between redemption accomplished and redemption applied, and that is a very helpful and necessary distinction. The point is that we shouldn’t oppose or separate them. The Bible binds them together and includes both under the term “gospel.”
Paul summarized the gospel he preached in terms of the death and resurrection of Christ (1 Cor. 15:1-5). But that is not all there is to the gospel, or even to the work of Christ. A summary of the gospel is just that—a summary—and it shouldn’t be set in direct opposition to its broader definition or fuller explanation.
There are some rather large problems that may arise when people limit the meaning of the gospel to its narrow sense. One potential problem is the unjust accusation of legalism or of mixing law and gospel. It is not necessarily legalistic to use phrases such as “living the gospel,” “obeying the gospel,” or “the conditions of the gospel.” But if you see what we do as only “law” and what Christ has done as only “gospel” then you will likely interpret the broad but biblical use of the term “gospel” as legalistic. Another potential problem is the minimization or outright denial of the conditions of the gospel, which is what the puritans called antinomianism.
If you confessed, however, the Heidelberg Catechism, what would its first answer do to efforts to make the gospel something you obey?
Q. What is your only comfort in life and death?
A. That I am not my own, but belong with body and soul, both in life and in death, to my faithful Saviour Jesus Christ. He has fully paid for all my sins with his precious blood, and has set me free from all the power of the devil. He also preserves me in such a way that without the will of my heavenly Father not a hair can fall from my head; indeed, all things must work together
for my salvation. Therefore, by his Holy Spirit he also assures me of eternal life and makes me heartily willing and ready from now on to live for him.
It’s not as if that assertion lacks good works. But the Holy Spirit is the one to produce good works. Obedience inevitably springs from a true faith that receives and rests on Christ. To speak of the gospel requiring good works places the burden on believers who thought they had comfort.
That may explain why in Paul’s short summary (too short for some) of the gospel in 1 Cor 15:1-5, he goes on to talk about the comfort that believers take from Christ’s finished work:
14 And if Christ has not been raised, then our preaching is in vain and your faith is in vain. 15 We are even found to be misrepresenting God, because we testified about God that he raised Christ, whom he did not raise if it is true that the dead are not raised. 16 For if the dead are not raised, not even Christ has been raised. 17 And if Christ has not been raised, your faith is futile and you are still in your sins. 18 Then those also who have fallen asleep in Christ have perished. 19 If in Christ we have hope in this life only, we are of all people most to be pitied.
So glad Paul did not write, “if Christ has not been raised, your obedience is futile and your good works don’t count for anything.”