Romans 2:19 - How the Jew Came to View Himself

Because God had given the Jews (and not the Gentiles) His written Law, the Jew came to view himself as:

From the description that Paul gives of the Gentiles in Romans 1:18-32, we know they are:

Indeed the Jews had been given the Law, but they had not kept the Law! Paul points out (in 2:13) that it is not those who hear the law who are righteous in God's sight, but it is those who obey the law who will be declared righteous.