"When the Holy Spirit was poured out upon the early church, the brethren loved one another. “They ... did eat their meat with gladness and singleness of heart, praising God, and having favor with all the people: and the Lord added to the church daily such as should be saved.” Those primitive Christians were few in numbers, without wealth or honor, yet they exerted a mighty influence. The light of the world shone out from them. They were a terror to evildoers wherever their character and their doctrines were known. For this cause they were hated by the wicked and persecuted even unto death. 5T 239.3"
"And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness of heart,"
EGW directly quotes Acts 2:46 and builds upon the description of the early church's unity and gladness.