Paul has spent the last eleven chapters explaining why and how both Jews and Gentiles are part of God’s family. He wanted the church in Rome to understand that both belonged and neither could claim superiority over the other. The Jews could not say they have God’s special favor and the Gentiles could not say that God has rejected the Jews. Paul wanted them to get along and understand that they were a family. But this isn’t your, “you guys are brothers, so stop fighting” type of family. Paul lays out clearly what is a desired, a family based on God’s love.
First, remember it’s not about you or what you have done, it’s about what God has done and is doing. Second, we all have different gifts, but we are all one body. Third, love each other and hate evil. Fourth, love your neighbor, even if he hates you. Feed him, clothe him, bless him.
Paul is saying what Jesus said, you gotta die to self. It ain’t about you, but about God. Fortunately, God love you and sent his son to rescue you. By dying to self you find your true self in God. Paul wants the church to live in harmony and peace (shalom) with themselves and with others. God leads, you follow.