For the sake of those reading this thread in the future after today's Q&Q has changed, the RZ quote is:
Two of the chief defenders of the faith in the Old Testament and in the New - Moses and Paul - were both well-versed in the language, the thinking, and the philosophy of their cultures.
I don't know if UntoHim does this intentionally, but it happens enough that I have assumed he does: Oftentimes the Q&Q on the right matches up in some way to the verse reference on the left.
Those verses currently are:
1 Corinthians 9:20-22
To the Jews I became as a Jew, in order to win Jews. To those under the law I became as one under the law (though not being myself under the law) that I might win those under the law. To those outside the law I became as one outside the law (not being outside the law of God but under the law of Christ) that I might win those outside the law. To the weak I became weak, that I might win the weak. I have become all things to all people, that by all means I might save some.
That illuminates Ravi's quote for me.