What was the chief advantage the Jews had?
The chief advantage the Jews had was that they had the very Word of God. While they also had the covenant, the temple, the priesthood, and the blessings of Jehovah God, the foremost benefit was possessing God's revealed Word.
Les explains that Paul asks in chapter 3, verse 1, what advantage the Jew had and what profit there was in circumcision. Paul answers, "Much, every way." The Jews had all kinds of advantages: they were the covenant people, they had the temple, they had a priesthood, and they had the very blessings of Jehovah God upon them. But the chief advantage, the most prestigious thing they had going for them, was that they had the Word of God. Les emphasizes that this was the best thing about them, not the worst.
Much every way: chiefly, because that unto them were committed the oracles of God.
More Questions
What advantage does Romans say the Jew had?
Paul answered his own question 'what advantage then hath the Jew?' with 'much every way, because unto them the Jew was committed the word of God.'