John 17:3 · Bible study
John 17:3 Commentary: The Knowledge That Is Eternal Life
Greek · 11 what the commentators say
Meaning in one sentence
What does it mean that eternal life is knowing God and Jesus Christ? Dive into the Greek grammar, theological depth, and pastoral implications of John 17:3.
Research Summary
- Meaning: Eternal life is defined as relational knowledge of the only true God and Jesus Christ, whom He sent.
- Key words: γινώσκωσιν (ginōskōsin), present subjunctive, emphasizing continuous, progressive knowledge.
- Main debate: Whether “only true God” excludes Christ from deity (Arian) or merely distinguishes the Father from idols (orthodox).
- Theological theme: Soteriology and the exclusivity of Christ as the way to know God.
- Best use: Foundational teaching on the nature of eternal life, evangelistic clarity, and discipleship growth in knowing God.
Translation Comparison
BSB Berean Standard Bible 2020
Now this is eternal life, that they may know You, the only true God, and Jesus Christ, whom You have sent.
WEB World English Bible 2000
This is eternal life, that they should know you, the only true God, and him whom you sent, Jesus Christ.
KJV King James Version 1769
And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.
ASV American Standard Version 1901
And this is life eternal, that they should know thee the only true God, and him whom thou didst send, even Jesus Christ.
YLT Young's Literal Translation 1898
and this is the life age-during, that they may know Thee, the only true God, and him whom Thou didst send--Jesus Christ;
Darby Darby Bible 1890
And this is the eternal life, that they should know thee, the only true God, and Jesus Christ whom thou hast sent.
Douay-Rheims Douay-Rheims Bible 1899
Now this is eternal life: That they may know thee, the only true God, and Jesus Christ, whom thou hast sent.
Translations in other languages (10 available)
Esta empero es la vida eterna: que te conozcan el solo Dios verdadero, y á Jesucristo|strong="G2424, G5547", al cual has enviado.
E esta é a vida eterna: que conheçam a ti, o único Deus verdadeiro, e a Jesus Cristo, a quem tens enviado.
Or, la vie éternelle, c’ est qu’ ils te connaissent, toi, le seul vrai Dieu, et celui que tu as envoyé, Jésus-Christ.
Das ist aber das ewige Leben, daß sie dich, der du allein wahrer Gott bist, und den du gesandt hast, Jesum Christum, erkennen.
En dit is het eeuwige leven, dat zij U kennen, den enigen waarachtigen God, en Jezus Christus, Dien Gij gezonden hebt.
E questa è la vita eterna: che conoscano te, il solo vero Dio, e colui che tu hai mandato, Gesù Cristo.
A toć jest żywot wieczny, aby cię poznali samego prawdziwego Boga, i któregoś posłał, Jezusa Chrystusa.
Сия же есть жизнь вечная, да знают Тебя, единого истинного Бога, и посланного Тобою Иисуса Христа.
認識 你─獨一 的真 神，並且 認識 你所差來 的耶穌 基督， 這 就是 永 生。
And this is eternal life: to have knowledge of you, the only true God, and of him whom you have sent, even Jesus Christ.
Verse in Context
Original Language (Koine Greek)
New Testament · Koine Greek · John 17:3
Source: STEPBible TAGNT/TEHB (CC-BY 4.0). Click or tap a morphology code to see the full parsing.
Scholars' Consensus
Commentators across traditions agree that eternal life in this verse is not mere unending existence but a relational, ongoing knowledge of the one true God and His sent Son, Jesus Christ. The Greek verb ginōskōsin (present subjunctive) indicates a continuous, progressive perception of God (Vincent). Eternal life consists in this knowledge, not as a means but as its very essence (Cambridge Bible). The phrase “the only true God” stands in contrast to the false gods of the heathen (Clarke, Barnes, Gill) and does not exclude the Son, for the immediate juxtaposition of Jesus Christ with the Father implies His deity (JFB). This knowledge includes love, reverence, and obedience (Barnes). It begins now and lasts forever.
How settled is the interpretation?
Interpretive difficulty: Medium
Main views:
- Arian / Unitarian: The verse calls the Father 'the only true God,' which they read as excluding Christ from the divine identity.
- Orthodox Trinitarian: The phrase contrasts the Father with idols, not with the Son; the surrounding context (John 1:1, 8:58) affirms Christ’s deity, and the juxtaposition of Jesus with the Father implies equal honor.
- Subordinationist: Some early and modern readers see the Son as divine but subordinate to the Father, consistent with the sending language and the Father being called 'only true God.'
What is clear: Eternal life is defined as relational knowledge of the Father and the Son, and Jesus presents Himself as the exclusive mediator of that knowledge.
What Scholars Agree and Debate
| Topic | Agreed | Debated |
|---|---|---|
| Nature of eternal life | Eternal life is not merely unending existence but a quality of relational knowledge of God and Christ. | Some traditions emphasize intellectual understanding of doctrine, while others stress personal, experiential intimacy as the core of this knowledge. |
| Identity of the only true God | The Father is the only true God in contrast to pagan idols and false gods. | Unitarian and Arian readings hold that this excludes the Son from being fully God; Trinitarian readings hold that the Father is the source of deity without excluding the Son and Spirit. |
| Role of Jesus Christ | Jesus is the sent Messiah, and knowledge of Him is essential for eternal life. | Whether the phrase ‘Jesus Christ’ was used by Jesus Himself or is the Evangelist's summary (Cambridge Bible suggests the latter). |
| Exclusivity of salvation | Eternal life is found in knowing both the Father and the Son. | Some Christians read this as excluding any possibility of salvation apart from explicit faith in Jesus; others allow for implicit knowledge through God’s general revelation, though that is not directly supported by the verse itself. |
Historical & Cultural Context
Jesus speaks these words in the upper room, just before His arrest. John 17 is the high priestly prayer, where Jesus prays for Himself, for His disciples, and for all future believers. In verse 2 He states that the Father has given Him authority over all people, so that He may give eternal life to all the Father has given Him. Verse 3 then defines that life.
The historical setting is first-century Judaism, surrounded by a polytheistic Greco-Roman culture. Calling the Father “the only true God” is a direct affirmation of Jewish monotheism against pagan idols. The term “true” (alēthinos) carries the sense of genuine, real, in contrast to the spurious gods of the nations. At the same time, Jesus includes Himself as the one whom the Father sent (apestetilas, aorist, emphasizing the historic commission). This is a bold claim: knowledge of the true God is inseparable from knowledge of His Messiah. For a Jewish audience, introducing a human mediator alongside the one God would be radical. Yet Jesus presents it as the very definition of life.
The prayer also echoes Old Testament passages where knowing God is covenantal intimacy, not simply facts (Jeremiah 9:23-24). Jesus takes that intimacy and anchors it in His own person.
Textual Notes
The supplied sources note no significant textual variants for John 17:3. The Cambridge Bible suggests that the wording, especially the use of “Jesus Christ” as a proper name, may be an abbreviation by the Evangelist rather than Jesus’ exact words, but no manuscript evidence for a different reading is cited. The Greek text is stable across the major witnesses.
Reception History
John 17:3 has played a key role in Christian soteriology. In the Arian controversies of the fourth century, this verse was used to argue that only the Father is the true God, a position rejected by orthodox fathers who insisted the phrase did not exclude the Son. Medieval theologians linked the verse to the Beatific Vision, seeing God as He is. Reformers like Calvin and Wesley stressed that the knowledge described is saving faith, inseparable from Christ. In modern evangelicalism, the verse is often cited to show that eternal life is a present possession, not just a future hope.
Preaching This Verse
Three-point outline
- Eternal life defined as knowledge. Jesus does not say eternal life is a place, a reward, or a duration. It is knowing the only true God. This reframes our understanding of salvation: it is personal, relational, and begins now.
- The object of knowledge. The Father is called “the only true God” in contrast to all false gods. This exclusive claim confronts every attempt to redefine God or to add other mediators.
- The mediator of knowledge. The Son is included as the sent one. Knowledge of God comes through Jesus Christ. There is no true knowledge of God apart from Him.
Five-point outline
- Progressive knowledge: The present subjunctive (ginōskōsin) shows that this knowledge is ongoing, not a one-time event. Eternal life involves a growing acquaintance with God.
- Exclusive knowledge: The Father is the only true God. This excludes all idols and all other alleged paths to God.
- Mediated knowledge: Knowledge of the Father comes through the Son, whom He sent. Jesus is the definitive revelation.
- Transformative knowledge: As Barnes notes, this knowledge includes love, reverence, and obedience. It changes how we live.
- Present and future knowledge: Eternal life begins in this age, but it reaches its fullness in the age to come.
Illustration hooks
- Knowing about versus knowing: You can read a biography of a famous person and know facts, but that is not the same as sitting at their table and calling them a friend. Eternal life is the friendship.
- The counterfeit detector: A bank teller learns to recognise genuine currency by handling the real thing, not by studying forgeries. Knowing the true God intimately makes false gods easy to spot.
- The guide on the trail: A GPS can give directions, but if the trail is washed out you need a guide who has walked it before. Jesus is not just a set of instructions; He is the Way Himself.
Questions your congregation is asking
- “If eternal life is knowing God, how do I actually grow in that knowledge day by day?”
- “Does this verse mean that people who have never heard of Jesus cannot be saved? Isn't that unfair?”
- “How can I be sure that I really know God and not just know about Him?”
Leading a Discussion
This verse gives a definition of eternal life that shifts our focus from duration to relationship. As you discuss, consider how your daily walk with God reflects this kind of knowledge. Read the verse aloud together, then work through the questions.
Discussion questions
- What does Jesus specifically say eternal life is? What does He not say it is?
- Why does Jesus call the Father “the only true God” here? What does that phrase reveal about the context of His hearers?
- The Greek verb for “know” is in the present tense. Why is that significant for understanding how eternal life works in the present?
- How does putting “the only true God” next to “Jesus Christ” in the same sentence challenge or confirm your view of Jesus?
- Barnes says this knowledge includes “love, reverence, obedience, honor, gratitude, supreme affection.” Do you think of knowing God in those terms? Which one is most lacking in your walk right now?
- If eternal life is a kind of knowledge, how does prayer, Scripture reading, or community help us grow in that knowledge?
- This verse is a prayer Jesus prays for His disciples. What does it tell you about His heart for you that He defines eternal life this way?
Word Study
The key original-language words in this verse. Select any word for its full lexicon entry — meaning, every occurrence in Scripture, and related words.
Cross-References
Source: Treasury of Scripture Knowledge (TSK, public domain)
| I Chronicles 28:9 | You, Solomon my son, know the God of your father, and serve him with a perfect heart and with a willing mind; for Yahweh searches all hearts, and understands all the imaginations of the thoughts. If you seek him, he will be found by you; but if you forsake him, he will cast you off forever. |
| II Chronicles 15:3 | Now for a long time Israel was without the true God, without a teaching priest, and without law. |
| Psalms 9:10 | Those who know your name will put their trust in you, for you, Yahweh, have not forsaken those who seek you. |
| Isaiah 48:16 | “Come near to me and hear this: “From the beginning I have not spoken in secret; from the time that it happened, I was there.” Now the Lord Yahweh has sent me with his Spirit. |
| Isaiah 53:11 | After the suffering of his soul, he will see the light and be satisfied. My righteous servant will justify many by the knowledge of himself; and he will bear their iniquities. |
| Isaiah 61:1 | The Lord Yahweh’s Spirit is on me, because Yahweh has anointed me to preach good news to the humble. He has sent me to bind up the broken hearted, to proclaim liberty to the captives and release to those who are bound, |
| Jeremiah 9:23 | Yahweh says, “Don’t let the wise man glory in his wisdom. Don’t let the mighty man glory in his might. Don’t let the rich man glory in his riches. |
| Jeremiah 9:24 | But let him who glories glory in this, that he has understanding, and knows me, that I am Yahweh who exercises loving kindness, justice, and righteousness in the earth, for I delight in these things,” says Yahweh. |
Interlinear and lexical data from STEPBible (CC BY 4.0). Cross-reference data from OpenBible.info (CC BY 4.0). Commentaries are public domain.
For personal reflection
Read the devotional page — prayer, application, and "for families"
What the Commentators Say
11 public-domain commentaries, condensed into plain language.
Adam Clarke's Commentary Methodist/Wesleyan 1826
Clarke defines eternal life as far more than endless existence: it is a redeemed, purposeful, and blessed life that begins in salvation and never ends. He specifically notes that calling God the "only true God" contrasts with false heathen gods, not with Christ, who John also calls the true God.
Barnes' Notes on the Bible Protestant 1832
Barnes stresses that knowing God and Jesus Christ means more than intellectual awareness; it is a practical, life-changing relationship involving love, reverence, and obedience. He also points out Christianity’s unique distinction: it combines worship of the one true God with faith in Jesus Christ as the sole Mediator, unlike other religions that lack this mediation.
Calvin's Commentaries Reformed 1564
Calvin distinguishes eternal life as the present, life-giving knowledge of God that transforms believers into His image. This knowledge comes only through Christ the Mediator, by whom we are adopted as children and heirs of heaven. For Calvin, this saving knowledge is essentially faith, uniting us to Christ.
Cambridge Bible for Schools and Colleges Anglican 1880
The commentary points out that the phrase "Jesus Christ" is almost certainly John's editorial summary, not Jesus's own words, since Jesus would not have referred to himself that way. It also stresses that "know" means "recognise," emphasizing personal appropriation of that knowledge, and that "
Geneva Bible Notes Reformed 1599
And this is life eternall, that they knowe thee to be the onely very God, and whom thou hast sent, Iesus Christ.
Gill's Exposition of the Bible Baptist 1748
Gill stresses that the knowledge of God and Christ which is eternal life is not intellectual or natural knowledge, nor the knowledge obtained through the law. It is an experiential, trust-filled knowledge of God as the Father of Christ and of Christ as Mediator, which brings salvation. He also insists this verse does not deny Christ's deity, since the Father is called the only true God only in contrast to pagan idols.
Jamieson-Fausset-Brown Commentary Protestant 1871
jfb stresses that eternal life is not endless existence but a personal, living acquaintance with God the Father and the Son. He notes that Jesus gives Himself the full title "Jesus Christ whom Thou hast sent," with each part pointing to His saving, anointed, and divinely commissioned roles, and that placing Himself alongside the Father implicitly confirms His deity.
Lange's Commentary Reformed 1857
Lange reads Christ’s prayer as a dynamic, concentrated act: Christ is not scattering grace randomly but pouring His entire resurrective power into a single point—the disciples—so that through them, the world itself is transformed and eventually dissolved as world. The exclusion of the world is not rejection but the law of concentrated divine force.
Matthew Henry's Commentary Reformed/Presbyterian 1710
Matthew Henry focuses on the timing and setting of this prayer: it came after Jesus had finished teaching his disciples, after the Last Supper, and as a family prayer with his closest followers. For Henry this makes it a model for preachers to pray over their sermons, for families to worship together, and for closing any solemn occasion with prayer.
Vincent's Word Studies Evangelical 1887
Vincent stresses that eternal life is not a static possession but an ongoing pursuit of knowledge, as the Greek verb for "might know" implies a continuous, progressive perception of God in Christ. He also highlights the aorist tense of "didst send," which points to the concrete, historic fact of Christ's mission.
Wesley's Explanatory Notes Methodist/Wesleyan 1754
Wesley stresses that knowing God and Jesus Christ is not merely the path to eternal life but its very substance. He clarifies that "the only true God" here excludes false gods, not the Son or Holy Spirit, and he presents Jesus in his full role as prophet, priest, and king.