Paul wrote 2 Thessalonians. He was from the city of Tarsus. He had been known as Saul in his early life. Before becoming a Christian, Paul was a Pharisee. He persecuted Christians. After he became a Christian, he traveled several times throughout the Roman Empire telling people about Jesus.
Paul wrote this letter to the believers in the city of Thessalonica. He encouraged the believers because they were being persecuted. He told them to continue living in a way that pleased God. And he wanted to teach them again about Christ's return.
Translators may choose to call this book by its traditional title, "2 Thessalonians" or "Second Thessalonians." Or they may choose a clearer title, such as "Paul's Second Letter to the Church in Thessalonica," or "The Second Letter to the Christians in Thessalonica." (See: [[rc://en/ta/man/translate/translate-names]])
## Part 2: Important Religious and Cultural Concepts ##
Paul wrote much in this letter about Jesus' eventual return to Earth. When Jesus returns, he will judge all mankind. He will also rule over creation. And he will cause there to be peace everywhere. Paul also explained that a "man of lawlessness" will come before Christ's return. This person will obey Satan and cause many people to oppose God. But Jesus will destroy this person when he returns.
Paul meant to express the idea of a very close union with Christ and the believers. Please see the introduction to the Book of Romans for more details about this kind of expression.
* "and the man of lawlessness is revealed" (2:3). The ULB, UDB, and most modern versions read this way. Older versions have, "and the man of sin is revealed."
* "For God chose you as the firstfruits for salvation" (2:13) The ULB, UDB, and some other versions read this way. Other versions have, "For God chose you from the first for salvation." If there are other versions in their region, translators should consider following their reading in this passage.
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