Who wrote the letter we call First Thessalonians? Why are three authors mentioned in 1 Thess 1:1? Where were they? How did they know the people in Thessalonica? When was the letter written and under what circumstances?
These are the sorts of questions we ought to ask when we study 1 Thessalonians, and we ought to ask similar questions of any book we study.
John Piper shows us briefly and clearly how to go about answering such questions. Consider his recent Look at the Book video where he provides the background for the writing of this letter, showing us in the process how to develop such research skills for ourselves.