Paul had traveled to Philippi and then to Greece for the first time. During this time, he and two traveling companions, Timothy and Silas, spread the word about Jesus to the Thessalonians. They formed a community of believers there and Paul was the founder of this new Christian community. He, Timothy, and Silas exercised authority over the Thessalonians according to 1 Thessalonians 4:7. " we were able to impose our weight as apostles of Christ". The three stayed with the newly founded community for a time to be examples of what "life in Christ" looked like.
After Paul, Timothy, and Silas had left Thessalonica, Paul became concerned about them because he heard that there were questions within the community that they were unable to resolve on their own. Paul sent his assistant Timothy back to them to help them work through these problems. When Timothy returned to Paul with a report on conditions at Thessalonica, this served as the occasion for Paul's letters.
It is clear from Paul's letters to the Thessalonians he and his companions had not only taught the Thessalonians, but had personally demonstrated to them how to conduct themselves and how to love one another. We can see this in his letter in 1 Thessalonians 4:1-2. Paul wrote, " You should conduct yourselves to please God and as you are conducting yourselves you do so even more. For you know what instructions we gave you through the Lord Jesus." 1 Thessalonians 1:5-6 also refers to their manner of conduct. He wrote, " you know what sort of people we were among you for your sake. And you became imitators of us and of the Lord, receiving the Word- Chapter 2 of 1 Thessalonians is another reference to this problem. In verses 11-12, "As you know, we treated each one of you as a father treats his children, exhorting and encouraging you and insisting that you conduct yourselves as worthy of God". .
Paul also made a reference in his letter that tells us he already expected them to know to love one another.
Born in Thessalonica in the 9th century, the brothers became Christian missionaries among the Slavic peoples of the Great Moravia and Pannonia. ... The conditions of the structure was deteriorated, therefore the World Monuments Fund placed Hagias Sophia on the 1996 World Monuments Watch and again in 1998. ...