You illustrate my exact point here, and show how you will not come to truth....Paul repeats the phrase according to the scriptures.........you ignore that....he has the whole ot in view...The gospel is given in 1 Cor 15:1-8 and there is no mention of the Law in those verses. Paul even goes on to say, "This is what we preach" in verse 9. No law in sight. I do see the word 'grace' several times though.
Your continued insistence that Paul preached the law or used the law in evangelism is wishful thinking. It is not recorded as happening in the Bible.
He says to Timothy that he has known the scriptures since he was a child which are able to make him wise unto salvation......that implies the person reads and understands the scriptures.