“This Is Eternal Life” (1 of 2)

Unpacking John 17:3 — The Definition That Reorganizes Everything

“Now this is eternal life – that they know you, the only true God, and Jesus Christ, whom you sent.”

— John 17:3 (NET)

The Definition Nobody Uses

Ask the average person in the average evangelical church what eternal life is, and you will receive some version of these answers: going to heaven when you die, living forever, escaping hell, resurrection to everlasting existence. All of these are true. None of them is the definition Jesus gave.

Jesus, praying to the Father in the holiest and most concentrated moment of His earthly ministry, defined eternal life as knowing. Not going. Not arriving. Not surviving death. “That they know you, the only true God, and Jesus Christ, whom you have sent.”

The word translated “know” is γινώσκω (ginōskō) in Greek, which corresponds to the Hebrew ידע (yada) — a word that in the Old Testament described not merely intellectual knowledge but the deepest possible experiential intimacy between persons. It is the word used in Genesis 4:1 where Adam “knew” his wife Eve. It is the word used in Jeremiah 1:5 where God says to the prophet: “Before I formed you in the womb I knew you.” It is the word used in Psalm 139 where David says “YOU have searched me and known me.” This is not the knowledge of information about a person. It is the knowledge that exists only inside a relationship of mutual self-disclosure, sustained over time, deepening through shared experience.

When Jesus defines eternal life as this kind of knowing, He is saying something that should reorganize the disciple’s entire orientation toward the Christian life. The goal is not the management of a belief system. The goal is not the performance of a moral code. The goal is not even the correct execution of spiritual disciplines. The goal is knowing. Intimate, experiential, growing, present-tense knowing of the living God and of Jesus Christ whom He sent.

Eternal life is not what you receive at the end of faithfulness. It is what faithfulness is made of. The knowing is not the reward. The knowing is the life.

The Grammar That Changes Everything

John 17:3 is in the present tense throughout. “Now this is eternal life.” Not “will be.” Not “will become.” Is. “That they know you.” Present tense. An ongoing, currently active state of knowing.

This grammatical observation has enormous practical consequences. If eternal life is future, then the disciple’s posture toward it is anticipation. He waits. He endures the present in hope of the future. He treats this life as a corridor leading to the room where eternal life actually begins.

If eternal life is present, the disciple’s posture toward it is entirely different. He is not waiting for eternal life to begin. He is living it now. Every moment of genuine knowing — every prayer in which the Father’s presence is felt, every Scripture passage in which the Spirit makes the text alive, every act of obedience that deepens the relationship, every suffering that drives him closer to the King rather than away from Him — these are not preparations for eternal life. They are eternal life being lived.

The difference between these two postures is the difference between a soldier who endures the present tour of duty in hope of going home and a soldier who has realized that home has already arrived, that the presence he was longing for is already the environment he inhabits. The first soldier tolerates the present. The second soldier receives the present as the gift it actually is.

The Two Objects of the Knowing

Jesus specifies two objects of the knowing that constitutes eternal life: “you, the only true God” and “Jesus Christ, whom you have sent.” These are not two separate knowings that add up to eternal life. They are two dimensions of a single knowing, inseparable and mutually illuminating.

Knowing the Father

“You, the only true God.” The exclusive claim embedded in “the only true God” is not incidental. Jesus is praying this in a world full of gods — Roman gods, Greek gods, local deities, the assembled pantheon of the ancient Near East. He does not say “the most important God” or “the God above all gods.” He says “the only true God.” All others are not lesser gods. They are no gods at all.

The knowing of the Father that constitutes eternal life is not the knowing of one option among many. It is the knowing of the only One who actually exists as God. Every other object of worship — every idol, every ideology, every system that a human being elevates to the position of ultimate allegiance — is not a competing source of eternal life. It is a void. A nothing. The person who invests his deepest knowing in anything other than the only true God is not achieving a lesser version of eternal life. He is achieving a profound and permanent emptiness.

This matters for the cultural battles Volume I describes at length. The gender ideologist who has made the self into a god, the materialist who has made security into a god, the political activist who has made the cause into a god — these are not people who have found an alternative to eternal life. They are people who are starving in the presence of a void they have mistaken for nourishment. They are the hungry of Matthew 5:6, whether they know it or not, and the only satisfaction available is the knowing that John 17:3 describes.

Knowing the Son

“Jesus Christ, whom you have sent.” The full name — Jesus Christ — is used here rather than simply “me,” which is what you might expect in a prayer. The use of the full name and the identification “whom you have sent” is a statement of the Son’s unique position as the Father’s authorized representative, the One who has been sent from outside the human story to deliver its resolution.

The knowing of Jesus Christ is not separable from the knowing of the Father. John 14:9: “Anyone who has seen me has seen the Father.” You cannot know the Father through a route that bypasses Jesus. You cannot know Jesus in a way that does not lead you to the Father. They are not two separate objects of knowledge that happen to be adjacent in the definition. They are two dimensions of a single reality — the divine life as it has been revealed in history through the incarnation, death, resurrection, and ascension of the Son.