Albert Barnes on Romans 3:1

What advantage, etc. The design of the first part of this chapter is to answer some of the objections which might be offered by a Jew to the statements in the last chapter. The first objection is stated in this verse. A Jew would naturally ask, if the view which the apostle had given were correct, what peculiar benefit could the Jew derive from his religion? The objection would arise particularly from the position advanced, (Rom 2:25,26) that if a heathen should do the things required by the law, he would be treated as if he had been circumcised. Hence the question, "What profit is there of circumcision?"