The Apostle Paul planted the church in Thessalonica on his second missionary journey (Acts 17:1-10). While there, Paul and his companions faced severe opposition from the Jewish community, forcing them to leave the young church prematurely.
Later, in Corinth, Paul learned news of the developing church from Timothy, whom he had sent back to Thessalonica to see how the believers there were getting along. The good news: the church was standing strong in the faith in spite of dangerous persecution. The bad news: the believers were confused about some of Paul’s teachings. Specifically, this second letter addressed the church’s misunderstandings regarding the Second Coming of Jesus Christ.
In Paul’s first epistle to the Thessalonians, he had encouraged the church to live in readiness for the Lord’s return. Some members of the church had interpreted this to mean that the Day of the Lord had already arrived. The instigators taught that since they were living in the last days and the Second Coming was imminent, there was no point in working. As a result, many had grown idle, simply waiting for the Lord to return. They had stopped working, depending on others to supply their daily needs.
So, as a continuation of 1 Thessalonians, Paul wrote to encourage the church in their trials and persecutions and to clear up misconceptions about end times events.
Author of 2 Thessalonians:
The Apostle Paul wrote this letter.
The second epistle to the Thessalonian church was written less than a year after the first. Paul penned the letter from Corinth in approximately AD 51-52, as a follow-up to his previous correspondence.
Paul wrote to the young believers in the newly established Thessalonican church, and to all Christians.