John 17:1-5

There is another important thought in this passage, for it contains the great New Testament definition of eternal life. It is eternal life to know God and to know Jesus Christ whom he has sent. Let us remind ourselves of what eternal means. In Greek it is aionios ( Greek #166 ). This word has to do, not so much with duration of life, for life which went on for ever would not necessarily be a boon. Its main meaning is quality of life. There is only one person to whom the word aionios ( Greek #166 ) can properly be applied, and that is God. Eternal life is, therefore, nothing other than the life of God. To possess it, to enter into it, is to experience here and now something of the splendour, and the majesty, and the joy, and the peace, and the holiness which are characteristic of the life of God.

To know God is a characteristic thought of the Old Testament. Wisdom is "a tree of life to those who lay hold of her" ( Proverbs 3:18 ). "To know thy power," said the writer of Wisdom, "is the root of immortality" ( Wisdom of Solomon 5:3 ). "By knowledge are the righteous delivered" ( Proverbs 11:9 ). Habbakuk's dream of the golden age is that "the earth will be filled with the knowledge of the glory of God" ( Habakkuk 2:14 ). Hosea hears God's voice saying to him: "My people are destroyed for lack of knowledge" ( Hosea 4:6 ). A Rabbinic exposition asks what is the smallest section of scripture on which all the essentials of the law hang? It answers, Proverbs 3:6 , which literally means: "Know him, and he shall direct thy paths." Again there was a Rabbinic exposition which said that Amos had reduced all the many commandments of the Law to one, when he said: "Seek me, and live" ( Amos 5:4 ), for seeking God means seeking to know him. The Jewish teachers had long insisted that to know God is necessary to true life. What then does it mean to know God?

(i) Undoubtedly there is an element of intellectual knowledge. It means, at least in part, to know what God is like; and to know that does make the most tremendous difference to life. Take two examples. Heathen peoples in primitive countries believe in a horde of gods. Every tree, brook, hill, mountain, river, stone has its gods and its spirit; all these spirits are hostile to man; and primitive people are haunted by the gods; living in perpetual fear of offending one of them. Missionaries tell us that it is almost impossible to understand the sheer wave of relief which comes to these people when they discover that there is only one God. This new knowledge makes all the difference in the world. Further, it makes a tremendous difference to know that God is not stern and cruel, but love.

We know these things; but we could never have known them unless Jesus had come to tell them. We enter into a new life, we share something of the life of God himself, when, through the work of Jesus, we discover what God is like. It is eternal life to know what God is like.

(ii) But there is something else. The Old Testament regularly uses know for sexual knowledge. "Adam knew Eve his wife, and she conceived, and bore Cain" ( Genesis 4:1 ). Now the knowledge of husband and wife is the most intimate there can be. Husband and wife are no longer two; they are one flesh. The sexual act itself is not the important thing; the important thing is the intimacy of heart and mind and soul which in true love precede that act. To know God is therefore not merely to have intellectual knowledge of him; it is to have an intimate personal relationship with him, which is like the nearest and dearest relationship in life. Once again, without Jesus such intimacy with God would have been unthinkable and impossible. It is Jesus who taught men that God is not remote and unapproachable, but the Father whose name and nature are love.

To know God is to know what he is like, and to be on the most intimate terms of friendship with him; and neither of these things is possible without Jesus Christ.