How long was Paul in Thessalonica, and what did he write to them?
Paul was in Thessalonica only a very short period of time. He wrote to them in chapter 2 of that letter, 'you know these things,' because he had covered the whole gamut from the rudimentary to the very deep things.
Les explains that Paul's stay in Thessalonica was just a very short period, yet he wrote in chapter 2 of that letter that the Thessalonians knew these things. The reason was that Paul had covered the whole gamut from the rudimentary to the very deep things. In contrast, the Corinthians had not gone into the deep things, and Paul could not speak to them as spiritual but as carnal, as he says in 1 Corinthians 3. Les notes that Corinth was the church with more problems than any of the other congregations Paul dealt with.