What Is 1 Thessalonians About? Probably Paul's Earliest Letter

1 Thessalonians is probably the earliest written book in the New Testament — earlier than any of the Gospels.

The situation

According to Acts 17, Paul preached in Thessalonica for three sabbath days before a riot drove him out of the city.

In other words: about three weeks of teaching, then a forced exit, leaving a group of brand-new believers to manage alone. He worried they would not survive it, and sent Timothy back to find out (3:1-5).

This letter was written after Timothy came back with good news. The relief runs through the whole thing.

What they were actually worried about

Not a doctrinal dispute but something concrete: some believers had died — what now?

They expected the Lord to return soon, so they feared the ones who died first had missed it. 4:13 states it plainly: "I would not have you to be ignorant, brethren, concerning them which are asleep, that ye sorrow not, even as others which have no hope."

I would not have you to be ignorant, brethren, concerning them which are asleep, that ye sorrow not, even as others which have no hope.1 Thessalonians 4:13 (KJV)

Paul's answer

His answer is not "do not be sad". Read the wording: "that ye sorrow not, even as others which have no hope."

He does not cancel grief; he changes what kind of grief it is. Christians still weep — they simply have something in their hands while they do.

Then 4:16-17 gives the well-known passage: the Lord himself shall descend, and the dead in Christ shall rise first. That word is the answer to their anxiety — those who died are not behind; they are ahead.

The practical instructions

The letter is unusually dense with concrete direction:

"study to be quiet, and to do your own business, and to work with your own hands" (4:11) — aimed at people who had stopped working because they expected the return imminently.
"Pray without ceasing. In every thing give thanks" (5:17-18).
"Quench not the Spirit. Despise not prophesyings. Prove all things; hold fast that which is good" (5:19-21) — neither closed nor credulous.

A verse that gets misused

5:22 is often rendered "abstain from all appearance of evil", and used to make people manage other people's impressions. The sense is closer to "keep away from evil in whatever form it appears". It is about the evil, not about how things look.

How to read it

Five chapters, about twenty minutes. Notice how often Paul says "you" — this is a letter to a particular group of people, not an essay.

Read the first half of Acts 17 in the BiblePro app, then 1 Thessalonians. And do look for a local church to read alongside others.