The BSB renders John 3:16 with “His one and only Son.” At John 1:14 it speaks of “the one and only Son from the Father,” and at John 1:18 of “the one and only Son, who is Himself God.” The word behind these expressions is monogenēs. Its relation to the church’s confession of the Son as only-begotten requires attention both to the word’s use and to the wider biblical witness to the Son’s relation to the Father. The manuscript variation at John 1:18 is a separate question from how monogenēs is translated. The BSB’s wording explicitly identifies the unique Son as God; the entry should explain that reading in its own terms.
The Word
μονογενής (monogenēs), pronounced mo-no-gen-ACE. A compound adjective. The first half is unambiguous: monos means “only, single, alone.” The question is what the second half attaches to.
There are two possibilities. One is the verb gennaō (γεννάω), “to beget” — in which case monogenēs means “only-begotten.” The other is the noun genos (γένος), “kind, type, race, family” — in which case monogenēs means “one of a kind, unique.” The older translations went with the first reading. The newer translations have largely gone with the second.
Both readings have real scholarly support. The shift began in earnest in the early twentieth century, when scholars like Dale Moody argued that monogenēs was a monos + genos compound and that the older “only-begotten” was an over-reading. Modern lexicons (BDAG included) have largely followed Moody’s view.
The older view was not unreasonable. Monogenēs in the Septuagint and the New Testament almost always refers to a parent’s child — the widow of Nain’s monogenēs son (Luke 7:12), Jairus’s monogenēs daughter (Luke 8:42), the boy at the foot of the Mount of Transfiguration (Luke 9:38). When a parent-child relationship is in view — and it always is in the Johannine uses — the begetting is in the conceptual neighborhood whether or not it is strictly in the etymology.
This is the kind of word where the etymology and the usage pull in slightly different directions, and where the translator has to choose between two defensible readings.
Range of Meaning
In Greek usage, monogenēs covers a narrow but loaded field:
- An only child. The dominant sense, used in extra-biblical Greek for a parent’s single child.
- A unique one of its kind. Used more rarely, as when Plato describes the universe as monogenēs — meaning the only universe, the unique one.
- An only child distinguished by special status. This is the sense in Hebrews 11:17, where Isaac is called Abraham’s monogenēs son even though Abraham also fathered Ishmael. The word here means “the only one of the promise” — unique by covenant role, not by being the only child Abraham ever sired. This is the example modern scholars most often point to when arguing that “only-begotten” misses the word’s broader range.
In the Johannine uses applied to Christ, the word does several things at once. It says that Christ is the only Son the Father has — there is no other. It says that Christ is uniquely related to the Father — there is no analogy. And, the older translators insisted, it says something about how this Sonship comes to be: by an eternal begetting, not by a creating.
Where You’ll Meet It
“The Word became flesh and made His dwelling among us. We have seen His glory, the glory of the one and only Son from the Father, full of grace and truth.” (John 1:14, BSB)
We also meet this verse in the study of logos. The BSB’s “the one and only Son from the Father” renders monogenēs. The older language of “only-begotten” belongs to the history of interpreting the Son’s unique relationship to the Father.
“No one has ever seen God, but the one and only Son, who is Himself God and is at the Father’s side, has made Him known.” (John 1:18, BSB)
This is the textually difficult one. Some Greek manuscripts read monogenēs theos, while others read ho monogenēs huios. The BSB reads, “the one and only Son, who is Himself God.” It explicitly identifies the unique Son as God. A reader who remembers “only-begotten Son” from an older Bible may be encountering both a translation choice and a difference in how the manuscript evidence is represented. Those are related questions, but they should be distinguished.
“For God so loved the world that He gave His one and only Son, that everyone who believes in Him shall not perish but have eternal life.” (John 3:16, BSB)
At John 3:16 the BSB uses “His one and only Son.” The wording emphasizes the Son’s uniqueness and His relationship to the Father. The church’s confession of eternal generation should be explained from the wider biblical witness, rather than made to depend on an English translation using “only-begotten.”
“Whoever believes in Him is not condemned, but whoever does not believe has already been condemned, because he has not believed in the name of God’s one and only Son.” (John 3:18, BSB)
Two verses later, the same word. The condemnation is for those who do not believe in the monogenēs Son.
“This is how God’s love was revealed among us: God sent His one and only Son into the world, so that we might live through Him.” (1 John 4:9, BSB)
John says it again in his first epistle. The pattern across the Johannine writings is consistent: when the monogenēs Son is named, the love of God is in view, and the relationship to the Father is what gives the title its weight.
What Confessional Lutherans Hear
For confessional Lutheran ears, monogenēs carries two emphases that much of the broader church lets fade.
First, the Son is eternally begotten. The Nicene Creed confesses Christ as the only Son of God, begotten from the Father before all the ages, begotten rather than made, and of one Being with the Father (Nicene Creed 2–3). That language was not chosen casually. The Nicene fathers chose “begotten” (gennēthenta) and “not made” (ou poiēthenta) deliberately to mark off what they meant from what the Arians meant.
The Arians said Christ was the highest creature, the firstborn of all creation in a strict sense — made by God before the world was made, but still made. The Nicene response was that Christ is not made at all. He is begotten, which is what God the Father does and what only God the Son receives — eternally, without beginning. Begetting produces another of the same nature; making produces something of a different nature. The Son shares the Father’s divinity precisely because the Son is begotten of the Father.
Monogenēs in the Johannine prologue and in 1 John identifies the Son’s unique relationship to the Father. The older rendering “only-begotten” makes the connection with the Creed’s vocabulary especially visible. The BSB’s “one and only Son” emphasizes uniqueness while consistently identifying Him as Son. Reading the BSB does not remove the doctrine of eternal generation; it asks the teacher to explain the connection through the biblical witness to the Son and the Father.
The translation “one and only” is defensible. Isaac in Hebrews 11:17 illustrates how monogenēs can mark a child’s unique status rather than identify the only child a parent has ever fathered. The doctrine of eternal generation concerns the Son’s eternal relation to the Father; its explanation should take account of how this word functions in each passage.
Second, the translation matters because the doctrine matters. The eternal generation of the Son is not an optional appendix to Christology. It is the doctrine that distinguishes the church’s confession of Jesus as fully God from the Arian, the Jehovah’s Witness, and the Mormon confessions of Jesus as a high creature. The Father has always had a Son. The Son has always had His being from the Father. The eternity of the Father is the eternity of the Son. There never was a time when the Son was not. Begotten, not made.
The pastoral payoff is that the Creed and the BSB can be read together with confidence. The Creed’s confession that the Son is begotten from the Father before all the ages names His eternal relationship to the Father. The BSB’s wording should be heard in its full biblical context, with the Son’s uniqueness and deity clearly in view.
Where People Get It Wrong
Three common ways.
The first is the Arian misreading: the assumption that “begotten” means “created at a point in time.” This is exactly the misreading Nicaea was formed to refute. The Father is eternal; the Son is eternally begotten of the Father. The begetting has no beginning, because the Son has no beginning. The word “begotten” is being used in a special theological sense — a sense it has nowhere else in human experience. Human begetting happens in time; divine begetting is outside of time. Human begetting produces a son who did not exist before; divine begetting expresses an eternal relationship within God Himself.
Mormons and Jehovah’s Witnesses often press on the word “begotten” to argue that Jesus was made — a high creature, the first of God’s creations, but still created. The Nicene Creed was written against precisely this argument. Begotten is not made. They are categorically different.
The second is the dismissal of the older translation as simply obsolete. “Only-begotten” has a long place in the church’s reading and confession. Its historical importance deserves explanation, while the BSB’s “one and only Son” deserves to be read on its own terms. Neither wording excuses a reader from examining the passage and the wider biblical witness.
The third is the textual confusion at John 1:18. Some manuscripts read monogenēs theos, others ho monogenēs huios. The BSB reads “the one and only Son, who is Himself God.” This is a question about the Greek manuscript tradition as well as a question about translating monogenēs. The BSB does not weaken the identification of the Son as God; it states that identification explicitly.
So What
For most readers, the practical takeaway is short: when you confess in the Nicene Creed that Christ is the only Son, begotten from the Father before all the ages, you are saying what your Bible also says, just sometimes in different words. The Bible verse and the creedal phrase are not in conflict. They are using complementary language for the same eternal reality.
For the Sunday school teacher and the small-group leader, the task is to show how the BSB’s “one and only Son” belongs with the Creed’s confession of the Son as begotten before all the ages, not made, and of one Being with the Father. Explain what the translation emphasizes and what the Creed confesses from the wider witness of Scripture. Neither the doctrine nor its explanation should rest on a single English adjective.
Both can sit on the same shelf. Just know what each one is doing.