Lesslie Newbigin on John 14. 6

"We do not know the destination. We have no map of what lies beyond the curtain, though theologians---and others---often use language to suggest that we have. We do not know the limits of the possibilities for our personal lives or for the life of the world. We do not know, and cannot know, all that God has prepared for those who love him. It is beyond the highest power of our imagination (1 Corinthians 2. 9).

"We do not know the destination; but we do know the way. That is the heart of the matter...He himself is the way, and therefore it is only by being made a part of his humanity that we are on the way and know that we are not lost even though we do not see the destination…To follow this way is, in fact, the only way to the Father. This is not to say that God has left no witness to himself in the rest of the life of the world. We have in fact been told that Jesus is the light that lightens every man and woman. What is being said here, as in the whole of the Gospel, is that Jesus is in fact the presence of God’s truth and God’s life in the world, and to know the Father means to follow the way which Jesus is, and which he has opened through the curtain of his living, his dying, and his rising from the dead.

"The word “God” has had and still has an almost infinite number of meanings. Here we are invited to accept the affirmation that there is but one way to come to the living God and know him as Father, and that is by being made one with this meek and humble man who goes to the cross carrying the sin of the world.”

The Light Has Come (Grand Rapids: Eerdmans, 1982), pages 182-183