The teachers remained in the local churches to instruct converts. The list of men in verses 1-3 symbolizes the universality of the gospel. Paul and Barnabas were Jewish. Lucius came from Cyrene in North Africa. Simeon, also Jewish, was called by a Roman name, thus indicating certain ties with the Romans.
Every soul is to minister.
He is to use every physical, moral and mental power, through sanctification of the Spirit, that he may be a laborer together with God. All are bound to devote themselves actively and unreservedly to God's service. They are to cooperate with Jesus Christ in the great work of helping others. Christ died for every man. Ministry means not only the study of books and preaching.