REVELATION AS CONCEALMENT
When we hear the word "Revelation", we often think of clarity, an open book with revealed secrets. Revelation is all that, but there's a flip side. If we think of Revelation as a light, it's important to note that light can as much conceal as reveal.
An example of this would be the Sun. We often think we see the Sun (it is the most obvious thing in a clear day), but one could make the argument that we don't really "see" the sun, we simply see the light that conceals it. A child could say the sun is a disk of light, and he/she would be right, and wrong. Make up done right brings out the beauty of a person, but it can also obscure their person in an image of who they want to be.
Taking this to theology, Christ really is the very revelation of God. If you have seen Him, you have seen the Father, but behind the words, there is a "flip side". No I'm not going to sneak him some weird stuff here and say that because of this flip side the Father isn't really like the Son. Rather this flip side shows you the very depth of that statement about the Son as image of the Father.
A way to say this is: Because God is revealed, he is ever more concealed. We regard God as infinite, so we do not mean he has been revealed in the sense of a "data stream", where "facts" about him have been uncovered in the way WikiLeaks finds classified documents. Rather we mean that who or what God is, is revealed in Christ. God as infinite, as omnipotent, omnipresent, and ultimately, as Love, is revealed in the person and acts of Christ.
Because He is infinite Love, we realize we don't really know Him, and the Christian journey is the way we come to know Him. In His revelation, we realize His concealment. He invites us to come to know Him more, on a never ending journey where the journey itself is also the Destination: God Himself, unfolding in ever more wonderful ways.