Different types of literature work in different ways. So as Bible students, we ought to have some idea of what we’re looking for when we begin to observe a text. And since epistles are logical literature, clearly presenting arguments, with premises and conclusions, we should look for such things. The conclusions are the main ideas of which the author wishes to persuade his audience. They can come in a variety of flavors.
Summarizing the entire letter
Sometimes, conclusions come in the form of thesis statements that summarize the main argument of an entire letter.
For example, Eph 4:1 summarizes the letter’s entire argument in two parts: “I therefore, a prisoner for the Lord, urge you to [Part 2] walk in a manner worthy of [Part 1] the calling to which you have been called.”
Another example is Hebrews 1:1-3, which states the letter’s thesis up front: “…God…has spoken to us by his Son…who sat down…”
John does the same thing in his first epistle: “I write these things to you who believe in the name of the Son of God, that you may know that you have eternal life” (1 John 5:13).
Introducing a section
Alternatively, thesis statements can come at the beginning of a section, to introduce the topic of the next division.
Hebrews does this all through the letter, weaving the topic statement of each new portion into the transitional paragraphs between sections. For example, see Heb 2:17: “Therefore he had to be made like his brothers in every respect, so that he might become a merciful and faithful high priest in the service of God, to make propitiation for the sins of the people.” This conclusion to the first section introduce the next section, which explains how Jesus is both a faithful high priest (Heb 3:1-4:14) and a merciful high priest (Heb 4:15-5:10).
Another example is 2 Timothy 2:1-2: “You then, my child, be strengthened by the grace that is in Christ Jesus, and what you have heard from me in the presence of many witnesses entrust to faithful men, who will be able to teach others also.” This thesis introduces the section, which expands on the how to entrust the message to faithful men (2 Tim 2:3-7) before also expanding on how to be strengthened by grace (2 Tim 2:8-13).
One more example: 1 Peter 2:11-12 is the thesis for the entire section that goes from 1 Peter 2:11 to 1 Peter 4:11. Everything contained in the thesis statement gets expanded on throughout the section: abstaining from passions (1 Pet 4:1-6), honorable conduct among Gentiles (1 Pet 2:13-3:7), being spoken against (1 Pet 3:8-22), and glorifying God (1 Pet 4:7-11).
Concluding a section
Sometimes, the thesis comes at the end of a section, summing up the argument in that part of the letter.
For example, Romans 3:19-20 condenses the argument of Rom 1:18-3:20. 1 Cor 14:39-40 states the argument of that chapter (though that argument was also introduced in 1 Cor 14:1). Philippians 4:1 states the thesis of Paul’s argument that he presented all the way from Phil 1:12 to that point.
Conclusion
Whether you are studying a lengthy or brief amount of text, don’t forget that the authors of epistles generally wanted to persuade their readers to believe or do something. They knew as well as writers do today, that one key to persuasion is to explicitly inform your audience what it is you would like to persuade them of. Therefore—here is my thesis statement at the end—we ought to look for thesis statements in the Bible’s logical literature, especially epistles.
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