Acts, Romans, and Gentiles

I read Acts 10 and 11 and Romans 11 this morning - in unrelated studies - and came to several related phrases;

"I now realize how true it is that God does not show favoritism but accepts men from every nation who fear him and do what is right." (Acts 10:34)

"...God has granted even the Gentiles repentance unto life." (Acts 11:18)

"...salvation has come to the Gentiles to make Israel envious." (Romans 11:11)

"Israel has experienced a hardening in part until the full number of the Gentiles has come in." (Romans 11:25)

I invite your wisdom into and understanding of these passages.