Paul's opening in 1 Thess follows his traditional pattern of addressing the recipients of his letters. His opening includes a greeting, thanksgiving, and prayer report. Paul, remembering the Thessalonians in prayer, attributes the effects of the gospel in the Thessalonians' lives. In verse 4, Paul asserts that God made their election sure or chose them. In verse 10, Paul climaxes by noting that Christ rescued them all from the coming wrath. In both cases, these actions represent the power of God and Christ through the divine workings of the gospel.
Paul wrote 1 Thessalonians during his stay in Corinth. This location can be inferred from his mention of Athens in 3:1 - 2. According to Acts 18:11, Corinth is the city visited, where he resided for a lengthy period of time. In addition, Paul wrote the letter upon Timothy's return from Thessalonica. Paul sent Timothy to strengthen and encourage the church as their missionary work was abruptly disrupted when the Jewish officials evicted them from the city. Timothy's report brought good news to Paul and this letter details Paul's heartfelt response to the church.