Cross-references | Knowable Word

Last week I wrote about how cross-references often cause us to flap our wings without achieving liftoff. They certainly keep us busy, but often at the cost of missing the point of the text at hand. This week I’d like to explain some pertinent and helpful uses for cross-references.

In writing this list, I want to clarify that cross-references are sometimes a necessary part of Bible study. In many cases, failing to check the cross-references may leave you with poor interpretation. However, keep in mind that cross-referencing is not always a necessary part of Bible study. If you leave your passage behind like a solitary child in a grocery store, you should always have good reason to do so. And typically the only compelling reason for such behavior is if you’ll be right back after grabbing an emergency item from the car or service desk.

So in what situations are cross-references appropriate?

1. When your passage is quoted by or alluded to by another passage.

The Holy Spirit did not leave us without direction on how to read the Scriptures. Each instance of divinely inspired interpretation of another passage should be for us as a tent-peg firmly driven into the temple. A clear example: Matthew 1:22 shows that Isaiah 7:14 is about something bigger than the prophet’s own wife and child (Isaiah 8:1-4). A less clear, but no less compelling, example: In Acts 7:25, Stephen definitively reveals Moses’ intentions in killing the Egyptian (Ex 2:11-12). This fact should do away with our common condemnation of Moses as a young, brash, and insecure young man foolishly committing an impulsive murder.

2. When your passage quotes or alludes to another passage.

This point is same as the first but in reverse. When your passage has a clear quote or allusion, don’t skim lazily past it. Look it up and study it in context! Connect that chain.

Simon Lutz (2013), Creative Commons

For example, too many people propagate the notion that Jesus told parables to confuse people, all because they read the words quoted from Isaiah 6 (Matt 13:14-15, Mark 4:12) without exploring their context. Isaiah’s larger point has to do with idolatry blinding the eyes of those who persistently cling to it. As G.K. Beale marvelously put it, we become what we worship. Jesus came not to speak confusion, but to speak with utmost clarity—a clarity that would open many blind eyes, while simultaneously driving committed idolaters deeper into their idolatry.

Allusions can be difficult to pick up on unless we continue devouring large portions of Scripture in our reading, getting more familiar over time with the language and ideas. Recently I was studying Psalm 106 with a small group, and we were struck by how much Psalm 106:20 sounds like Romans 1:23. They are so close that it can’t be mere coincidence. Thus our study of Psalm 106 in context gave us deeper understanding of the point Paul appropriates for his purposes in Romans 1.

3. When an earlier passage holds crucial context.

I’m studying Mark 15:1-20, where Jesus is called King of the Jews but not treated in a kingly manner. I must go back to Mark 10:32-34 to see that things are playing out exactly as this king intended.

Or I’m studying Joshua 24, and there appears a sudden reference to Joseph’s bones. I must go back to Exodus 13:19 and Genesis 50:25 for context.

4. When a later passage offers a crucial explanation.

Over the last 2 months, I’ve read Exodus 6 times to prepare for preaching through the book. As I read, I’ve tried to make sense of the tabernacle sections in Ex 25-31 and Ex 35-39.

One question I had was why the order of instructions (Ex 25-31) differs from the order of production (Ex 35-39). And while I don’t have a great answer yet, pursuing that question led to another one: Why are the census tax (Ex 30:11-16) and priestly ordination service (Ex 29:1-46) the only sets of instructions not repeated in the production chapters? Especially when the production chapters repeat the phrase that Moses did all the things exactly as the LORD had commanded him (Ex 39:1, 5, 7, etc.)?

As for the census tax, this brought my attention to the incident where David takes a census but doesn’t collect the tax (2 Sam 24, 1 Chr 21). Suddenly, another mystery unlocks for me: why David’s census was so egregious in God’s sight.¹ And why the resulting plague is stopped when David purchases the land later used to build the temple. It’s all connected to Moses’ census tax to support the building of the tabernacle.

As for the priestly ordination service, I didn’t get an answer until I kept reading into Leviticus. The service does take place, word for word, in Leviticus 8. According to the structure of Exodus, I would expect it between Exodus 40:3 and Exodus 40:34. But Moses pulls it out of there and delays it until after the instructions for sacrifices (Lev 1-7). Again, I don’t have a crystal clear answer about why Moses did this, but the later text (Lev 8) highlights for me how important those instructions will be when I come to teach them in Ex 29. They are important enough to warrant a delay before we see them fulfilled.

5. When another passage illumines otherwise unknown historical or cultural background.

For example, our generation has no idea what it means to cut an animal in half and pass between the pieces. So no Bible study of Genesis 15 can be complete without first referring to Jeremiah 34:18-20 to clue us in.

As with most tools, the blessings or curses come not from the tool itself but from how we use it. I could use a blow dryer on an extension cord to defrost my windshield; but why would I want to? Likewise, let’s make great use of cross-references.

¹My colleague Mark Fodale made this point in a talk years ago, and I’m now appreciating the depth of his insight.

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My ministry’s Board of Directors recently met with a consultant, who, among other things, warned us to watch out for “wing-flapping reports” from the Chief Executive. Such reports deftly avoid reporting on tangible progress toward required objectives, and they do so by describing the flurry of activities undertaken by the organization during the reporting period. “We did this event…and this conference…and began this program…and updated these employee benefits…and connected with all these people…and we just did a great job, didn’t we?” Such wing-flapping isn’t usually sinister; it merely flows from a lack of clarity regarding results and production. When we’re unsure what we ought to produce, we seek assurance instead from how busy we were.

Of course, this concept taught me an invaluable lesson about leadership and accountability, but, surprisingly, it also taught me about Bible study. I’ve attended countless Bible studies that were busy, active, and engaging—but that also left me feeling like we didn’t get anywhere. We can spend lots of time in Scripture and make use of many resources, but do we know God through Jesus Christ any more deeply than when we began? We flap our wings and feel great about it. But there’s something more to be done.

And while I could nominate many potential culprits in the “wing-flapping Bible study” cartel (search engines, commentaries, and word studies come quickly to mind), there is one chief culprit I see more than any other: cross-references.

How Cross-References Get Us to Flap Our Wings Without Achieving Liftoff

Sinclair Ferguson wrote an excellent commentary on the book of Daniel. In fact, it’s the only Daniel commentary I’ve read that I’m happy to recommend as promoting OIA Bible study. I love this commentary, and you should check it out if you study Daniel.

But notice how the good Dr. Ferguson flaps his wings a bit, filling the page with cross-references without moving his argument forward. On Daniel 5, he writes:

From all we know of Belshazzar, he had fallen into the sin of Rehoboam. He once sought the advice of his elder statesmen and was counseled: “If you will be a servant to these people today, and serve them, and answer them, and speak good words to them, then they will be your servants forever.” Rehoboam rejected this counsel, however, and consulted those who had grown up with him (1 Kings 12:7-8); the result was the division of the tribes into two camps, Israel to the north and Judah to the south. Similarly, Daniel’s counsel appears to have gone unheeded and eventually unsought. Finally, however, he was brought into Belshazzar’s presence. (pp.117-118)

A lengthy catalog of Daniel’s credentials is provided by the queen…. He had “light and understanding and wisdom” and “an excellent spirit, knowledge, understanding, [and abilities to interpret] dreams, solv[e] riddles, and explain enigmas” (vv.11, 12). This description is reminiscent of the prophetic description Isaiah gave of the Messiah [quotes Isaiah 11:2-3].

Daniel had a share in the Spirit of the Messiah just as surely as what Christians now experience is a share in the Spirit of the Messiah and a taste of the powers of the age to come (cf. Heb. 6:5). No wonder there were so many ways that Daniel resembled Christ. This was what the queen tried to express. Daniel was in fellowship with another world; he knew God. (pp.119-120)

Why did Daniel refuse the king’s offer? Probably there were two reasons for his refusal. (1) It was important for him to make plain that spiritual gifts cannot be bought. Instinctively we are reminded of Simon Magus [quotes Acts 8:18-20]…. (2) It was important for him to make plain that God’s servants cannot be bought [quotes 1 Thess. 2:4-5]. (pp.120-121)

Alan Vernon (2010), Creative Commons

“Similarly…This description is reminiscent of…Instinctively we are reminded of…” Such is the language of wing-flapping cross-references. Unfortunately, after romping our way through 1 Kings, Isaiah, Hebrews, Acts, and 1 Thessalonians, we don’t know the text of Daniel any better. But we certainly feel like we’ve accomplished something. Ferguson is much more helpful when he sticks to the text at hand, applying his marvelous insights to analyze, explain, and apply it for us.

What This Looks Like in Practice

I once led a Bible study attended by a sweet, godly older woman. She had been walking with Christ for decades, and she was very familiar with God’s word. Week after week, however, she left me wondering whether she wanted to study the Bible with us.

We might be studying Matthew, and she’d want to jump to Romans. Or we’d study a Psalm, and she’d try to take us to 1 Peter. Much of our discussion was a tug-of-war between her, wanting us to turn to different passages, and me, asking whether the cross-reference would help us with the passage at hand.

One week, I experimented by giving her the reins. When she wanted to pull us to a new passage, I went with her. Once we got there, she read it, and I asked her what it meant. For her answer, she said it reminded her of another passage. So we went there. After reading it, she took us to yet another passage. This went on until we read a passage that reminded her of the original one, and we ended up back where we had begun.

With each jump, we read the text and treated its message as self-evident. When it made us think of something else, we were off. After an hour of such discussion, one thing was clear: We had not understood the message of any of these passages. But because we flipped so many pages and moved so quickly, some people felt we had accomplished something spectacular.

Now I don’t think cross-references are inherently unhelpful. There are times when they are good and necessary in Bible study. More on this next week.

But I do get nervous when someone treats “cross-references” as a standard step in Bible study. Or when someone wants to leave the current passage without good reason to do so, or without having first put in the time to get the point. In most cases, the original audience didn’t have access to all the cross-references (or the full canon of Scripture). But they still could understand and apply the text’s main point. So should we.