A young church encouraged — holy living, hope for the dead, and the Lord's return.
"Pray without ______."
This may be the earliest book of the New Testament — written around AD 50, likely before any of the four gospels were set down.
Every one of its five chapters ends with a reference to the return of Christ — the letter's heartbeat from start to finish.
Paul was in Thessalonica only about three weeks before a mob ran him out — this letter is him finishing the discipleship course by mail.
'Pray without ceasing' sits in a rapid-fire list of one-line commands in chapter 5 — rejoice evermore, quench not the Spirit, prove all things. Memorize the run; we pull from it.