What does ‘only begotten Son’ mean?
Question 3026
“For God so loved the world, that he gave his only begotten Son…” (John 3:16, KJV) This phrase has comforted believers for centuries, but what exactly does it mean? Does “begotten” imply that Jesus had a beginning? Did the Father create the Son at some point in eternity past? These are not trivial questions. Getting this wrong leads to serious error. Thankfully, when we look carefully at the original language, the meaning becomes wonderfully clear.
The Greek Word: Monogenēs
The phrase “only begotten” translates the Greek word μονογενής (monogenēs). For centuries, this word was thought to derive from two roots: μόνος (monos), meaning “only” or “alone,” and γεννάω (gennaō), meaning “to beget” or “to generate.” This etymology led to the translation “only begotten” and caused some to think Jesus was generated or produced by the Father at some point.
However, modern scholarship has clarified that monogenēs actually derives from μόνος (monos) and γένος (genos), meaning “kind” or “class.” The word thus means “one of a kind,” “unique,” or “the only one of its type.” This understanding is reflected in more recent translations. The ESV renders John 3:16 as “his only Son.” The NIV has “his one and only Son.”
This distinction is important. The word does not primarily speak of origin or generation. It speaks of uniqueness. Jesus is the unique Son of God, the only one of His kind. There is no other like Him.
Evidence from Scripture
The way monogenēs is used elsewhere in Scripture confirms this meaning. In Hebrews 11:17, Isaac is called Abraham’s “only son” (monogenēs). But Isaac was not Abraham’s only son in terms of origin. Abraham had fathered Ishmael before Isaac and would later father children through Keturah. Yet Isaac was the unique son, the son of promise, the one-of-a-kind heir through whom the covenant blessings would come. The word speaks of Isaac’s unique status, not his origin.
Similarly, when John calls Jesus the monogenēs Son of God, he is not describing how Jesus came into existence. Jesus, as the eternal Word, had no beginning. “In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God.” (John 1:1–2) The Son did not come into being at some point. He has always existed in eternal relationship with the Father.
The Eternal Sonship of Christ
The doctrine of the eternal Sonship of Christ teaches that Jesus has been the Son of the Father from all eternity. The Father-Son relationship is not something that began at the incarnation or at some point in eternity past. It is an eternal relationship within the Godhead. The Father has always been Father; the Son has always been Son; the Spirit has always been Spirit.
This does not mean the Son was created. The Nicene Creed carefully addressed this: “begotten, not made, of one Being with the Father.” The language of begetting in the creed speaks of the eternal relationship of the Son to the Father, not of an act of creation. The Son is “eternally begotten,” which is a way of saying He has always stood in this unique relationship to the Father.
In modern English, we typically use “beget” to refer to the origin of something. But the theological use of the term in the creeds is trying to preserve the distinction between the Son’s relationship to the Father (which is unique and eternal) and the creation (which came into being at a point in time). The Son shares the Father’s nature; creation does not.
Why This Matters
The Arians (the forerunners of the Jehovah’ Witnesses) of the fourth century taught that the Son was created, that “there was a time when He was not.” The Council of Nicaea in 325 AD rejected this as heresy. Jesus is not a created being, however exalted. He is God of very God, light of light, true God of true God. He shares the Father’s essence completely and eternally.
When we read “only begotten” in older translations, we should understand it to mean “unique” or “one of a kind.” Jesus is the unique Son of God in a way that no angel, no human, no creature of any kind can be. He alone shares the Father’s nature. He alone is the eternal Word made flesh. He alone is the radiance of the glory of God and the exact imprint of His nature. (Hebrews 1:3)
Conclusion
What does “only begotten Son” mean? It means that Jesus is the unique, one-of-a-kind Son of God. It does not mean He was created or that He had a beginning. The Greek word monogenēs emphasises His uniqueness, not His origin. Jesus is eternally the Son, sharing fully in the divine nature of the Father. This is why His coming into the world is such staggering news. God did not send a created being to save us. He sent His unique Son, the One who shares His very nature, to become one of us and die in our place. “For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life.” (John 3:16)
“No one has ever seen God; the only God, who is at the Father’s side, he has made him known.” John 1:18
