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2 Thessalonians 3 Bible study: The Lord is faithful

2 Thessalonians ends as it began, with grace and peace (1:2, 3:16, 3:18). And in its last chapter, three words Strong's ties together stand side by side: "not all have faith. But the Lord is faithful" (3:2-3), then "We have confidence in the Lord concerning you" (3:4).

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“But the Lord is faithful, who will establish you and guard you from the evil one.”
2 Thessalonians 3:3 · World English Bible

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“2 Thessalonians 3:18 says, "The grace of our Lord Jesus Christ be with you all."”

Is that in 2 Thessalonians 3, or not? Make your call.

What's really going on

The Lord is faithful

In the text

The chapter opens: "Finally, brothers, pray for us, that the word of the Lord may spread rapidly and be glorified, even as also with you, and that we may be delivered from unreasonable and evil men; for not all have faith." (3:1-2) (tap spread rapidly). Then: "But the Lord is faithful, who will establish you and guard you from the evil one." (3:3) (tap faithful). "We have confidence in the Lord concerning you, that you both do and will do the things we command." (3:4) (tap command). And: "May the Lord direct your hearts into God’s love and into the perseverance of Christ." (3:5) (tap direct).

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Questions people ask about 2 Thessalonians 3

That was a taste

The rest of 2 Thessalonians 3 is waiting in Favor

  • Imitate us
  • Don’t be weary in doing what is right
  • The grace of our Lord Jesus Christ
  • Jesus Christ, in this chapter's own words
  • Set beside this chapter elsewhere in Favor
  • 10 questions as you read
  • 11 more Greek words
  • A short check at the end
  • Your notes, saved as you go
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The Greek word behind it

πιστόςpistossay pis-TOS

Strong's: "objectively, trustworthy; subjectively, trustful". "But the Lord is faithful, who will establish you and guard you from the evil one." (3:3): behind faithful is this word, and 2 Thessalonians has it only here (in all eight editions TAGNT compares). Here is what almost everyone misses: the verse before ends, "for not all have faith" (3:2), and behind faith there is the noun pistis (G4102). Strong's gives both words as formed "from G3982", and G3982 is the verb behind We have confidence in the next verse, "We have confidence in the Lord concerning you" (3:4). Favor's Luke 16 studies this word in Luke.

For your group

2 Thessalonians 3 Bible study questions

  1. 1"Finally, brothers, pray for us" (3:1). Whom could you pray for this week, and what would you ask?
  2. 2"for not all have faith. But the Lord is faithful" (3:2-3). What helps you hold on to the Lord's faithfulness?
  3. 3"But you, brothers, don’t be weary in doing what is right." (3:13). What helps you keep going in doing what is right when it is hard?

Leading a group? In Favor, everyone reads 2 Thessalonians 3 during the week and answers these questions privately. Answers stay sealed until you meet, then appear together, and you can print the week's sheet.

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Questions

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Favor is a Bible study app that explains every chapter as you read: the Hebrew and Greek behind the words, the details most readers miss, and how each part of the Bible leads to Jesus. Read on your own, or start a Bible study with friends, family or your church.

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Last reviewed October 8, 2026. Scripture quotations are from the World English Bible, which is in the public domain. Hebrew and Greek words are checked against the original-language texts and public-domain lexicons. What we believe · Favor home