Even in the Old Testament, God has not wanted to relate to people through works, but instead through grace and faith! The nation of Israel thought that they could keep the law themselves. And, though they have been God's chosen people throughout all of human history, He chose to stop working through them for a time because they rejected His grace and subsequently, hardened their hearts. This does not mean that God has forgotten or rejected the Jews, He will still carry out His promises to the Jews after the Church Age. God is continuing to execute His vast, eternal plan of rescue and is choosing to use anyone and everyone who wants to following Him.