Paul continues to explain how Israel has rejected their need for a Messiah to save them from their sins because of their own self-righteousness. In this passage, we see the heart of salvation (what it is and what it isn't) and we see the extent of salvation (who it is for, and what implications it creates).
The Heart of Salvation (5-10)
Righteousness based on works leads to death
Righteousness based on faith leads to life
The Extent of Salvation (11-13)
Jesus gives salvation to all who call upon His name
Jesus changes everything