Romans 10:6 But the righteousness based on faith says, "Do not say in your heart, 'Who will ascend into heaven?'"(that is, to bring Christ down) 7 or "'Who will descend into the abyss?'"(that is, to bring Christ up from the dead). 8 But what does it say? "The word is near you, in your mouth and in your heart" (that is, the word of faith that we proclaim); 9 because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. 10 For with the heart one believes and is justified, and with the mouth one confesses and is saved. 11 For the Scripture says, "Everyone who believes in him will not be put to shame." 12 For there is no distinction between Jew and Greek; the same Lord is Lord of all, bestowing his riches on all who call on him. 13 For "everyone who calls on the name of the Lord will be saved."
Some believers in the local church of Rome were condemning others in the church based on personal opinion, not based on the truth of God’s word (Romans 14:1-13, vs. 1 is better translated “opinion” rather than “disputable matters”). Paul wisely brings unity to the local Body by bringing each divisive person back to the truth. Division occurs when people judge by personal opinion instead of by the truth of God’s word. Division keeps the world from believing Jesus was sent into the world to save them (John 17:20-21). Unity is achieved when believers live by God’s truth. The best way for believers to help the world believe in Jesus is for them to live in unity.
Our text today gives us the essential truth that is necessary for unity: all people are made righteous and saved by believing Jesus is Lord and has been raised from the dead. If a person truly believes Jesus is Lord, then he will desire to obey Jesus and has saving faith (Romans 1:5; James 1:26). If a person believes Jesus was raised from the dead, then he believes the Scriptures (Old Testament) and the words Jesus has spoken (New Testament) according to John 2:18-22.
We need to remember that everyone, Jew or Gentile, who calls on the name of the Lord, will be saved.