Tie that together with Matthew 11:27. Those who can know the Father are those who are having the Father revealed to them by the Son.
It is through the life, the works, and the words of Jesus Christ that we come to know the names of God. Moses asked God to show him His way. "If you want to see what God is like, if you want to see the mind of God, if you want to see the nature of God, if you want to see God's whole attitude," Jesus Christ is saying, "look at Me!" He is the way because, of all of mankind (all who have ever lived), He is the only one who has intimate knowledge of the Father that is totally, completely, unmarred by sin. His vision of God is absolutely perfect and accurate.
Jesus Christ shows the way men should walk. Actually, I should not say, "should." The way men must walk. He shows us the direction, the manner, the method of doing things. The way to God lies in knowledge of the Son. This is exactly what Christ has done, in declaring the glory of the Father to mankind.
In addition to that, He is truth. There are people who can speak truth. They can teach us truth. I can teach you truth. Many others can teach us truth. But Jesus Christ was truth. He embodied it! Everything that He did and said was absolutely right on the mark—every time, without fail. No misleading, no shadow of turning. No time, at any time in His life, was there ever even the tiniest hint of deception about God, about what He is, or the way to go, or the way to do things. Everything is right on the mark.
That is important, because I could get up here and I could teach you things—let us say about geometry. Whether I am a man of integrity, of responsibility—and what my character is like—does not matter a great deal. It does not affect the mathematical truth of geometry. But if a person is going to teach you moral and spiritual and ethical truth, what that person is makes all the difference in the world.
Would you like to receive a lesson on purity from an adulterer? There is an inborn resistance to that kind of thing. But it is awfully hard to refute and to find fault with the words of a person who embodies truth, and he is teaching truth—because you know that person is living it. Then those words carry weight and authority.