So what's the advantage of being a Jew? Or what's the benefit of circumcision?
Plenty in every way. First of all, the Jews were trusted with God's revelations.
What does it matter, then, if some weren't faithful? Their lack of faith won't cancel God's faithfulness, will it?
Absolutely not! God must be true, even if every human being is a liar, as it is written: So that it can show that you are right in your words; and you will triumph when you are judged.
But if our lack of righteousness confirms God's justice, what will we say? That God, who brings wrath upon us, isn't just (I'm speaking rhetorically)?
Absolutely not! If God weren't just, how could he judge the world?
But if God's truth is demonstrated by my lie and it increases his glory, why am I still judged as a sinner?
Why not say, "Let's do evil things so that good things will come out of it"? (Some people who slander us accuse us of saying that, but these people deserve criticism.)