Romans begins and ends with the phrase, "obedience of faith." Chapter one, verse five reads, "we have received grace and apostleship to bring about the obedience of faith among all the Gentiles." Then the Apostle Paul brings the letter to an end with these words:
Now to Him who is able to establish you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery which has been kept secret for long ages past, but now is manifested, and by the Scriptures of the prophets, according to the commandment of the eternal God, has been made known to all the nations, leading to obedience of faith; to the only wise God, through Jesus Christ, be the glory forever. Amen. - Romans 16: 25-27
Intriguing, isn't it, that the Apostle Paul starts and ends his letter with this pairing "obedience of faith?"
We'd never word it this way. We'd speak of the confession of faith, the grace of faith, the blessing of faith, the certainty of faith, justification by faith, the assurance of faith—anything but the obedience of faith. As we see it, in Christianity faith has displaced obedience from the pride of position it holds in all man's religious schemes of salvation. Further, any talk of obedience is dangerous because man's pride is always chomping at the bit to turn away from dependence upon God's grace, returning to dependence on his own self-righteousness.
"It's all of grace! That's what it means to be Protestant and Reformed! Catholics and Arminians talk about obedience because they believe in salvation by works, but all of us know they're wrong. Grace is everything!"
And yet, there the phrase is at the beginning and end of the book of Romans: the obedience of faith. We must admit it surprises us. If we didn't know it was there, we'd not think it wise for the Apostle Paul to speak this way. We'd warn him that a phrase like this will be used by some people...