The most likely author of 1 Thessalonians 5:16-18 is the apostle Paul. Paul was a devout Jew who initially persecuted Christians but had a life-changing encounter with Jesus Christ on the road to Damascus. He became a fervent believer and champion for spreading the gospel to the Gentiles.

Paul played a significant role in establishing the early Christian Church, writing numerous letters to various churches to provide guidance, encouragement, and theological instruction. His epistles, including 1 Thessalonians, are considered foundational texts of the Christian faith.

From an evangelical Christian perspective, Paul is viewed as an inspired author whose writings are considered divinely inspired and authoritative. His words in 1 Thessalonians 5:16-18 encourage believers to “Rejoice always, pray without ceasing, give thanks in all circumstances,” highlighting the importance of prayer, gratitude, and joy in the Christian life.

Overall, evangelical Christians hold Paul in high esteem as a faithful servant of God who faithfully proclaimed the message of salvation through Jesus Christ and provided valuable insights into living a life of faith and obedience.