Paul would have had time to get to know Silvanus’s character and teaching ability during the time he and Judas spent in Antioch explaining the decision of the council and encouraging the believers (Acts 15:32). Paul must have developed a respect for Silvanus; after his disagreement with Barnabas at the beginning of his second missionary journey, he chose Silvanus as his co-worker (Acts 15:36–40). The narrative of Acts 16—17 shows that Silvanus had a prominent role alongside Paul in proclaiming the gospel in Philippi, Thessalonica, and Berea.
1 Paul, Silvanus, and Timothy,To the church of the Thessalonians in God the Father and the Lord Jesus Christ: Grace to you and peace.