17 They have not/never known how to live peacefully with other people.
18 They absolutely refuse to fear/reverence God SYN!
19 Furthermore, we know that it is to Jewish people, who are required to obey God's laws, that Moses wrote those laws PRS. We can infer from this that there are no Jews or non-Jews SYN who are able to say anything in reply to God's saying that he will punish them for having sinned. God has declared everyone in the world MTY guilty!
20 It is not because people have done the things that God's laws require that God will ◄erase the record of their sins/declare them no longer guilty for sin►, because no one has done those things completely. In fact, the result of our knowing God's laws is that we know clearly that we have sinned (OR, are sinful).
21 But God's ◄erasing the record of our sins/declaring us no longer guilty► does not depend on our obeying the laws that he gave Moses. It has now been { God has now} revealed to us how he erases the record of our sins by a different way. It was written about by Moses { Moses wrote about it} in the laws PRS God gave him, and it was also written about by the prophets {the prophets also wrote about it}.