Romans 15:10

And again he saith, Rejoice, ye Gentiles, with his people.

The call is for Gentiles to rejoice together with God's people. Its promise belongs to converted Jews and Gentiles joining together among God's chosen followers. In the closing days some Jews will be reinstated among God's people and will receive the Lord's blessing as they enter into this shared rejoicing. That shared rejoicing is expressed in worship through gratitude, thanksgiving, and praise to God, in fellowship with Christ.

Rejoicing together means guarding the door of the lips and speaking no provoking or faultfinding word. It means refusing to listen to criticism of others, and speaking only kind, tender, encouraging words that bring refreshing and blessing to the heart. It means meeting harshness with silence, confessing faults and seeking God's forgiveness, and being converted from a quarrelsome, critical spirit. This unity keeps the eyes fixed on Jesus and leads to entrance into the city of God.