"Show us the Father" St. Augustine of Hippo

Don't go looking for any end beside God, in case by looking for an end beside God, you find yourself being consumed, not completed.  What is an end, after all, but the point we wish to reach, to stop at, and not to look for anything beyond it?  Because if you get there, but are still looking for something, you haven't yet reached the end.  So to reach the end is to reach the spot where you say,

"That's enough."

Philip thought that the Father alone was such an end, and so he said, 
Lord, show us the Father and it is enough for us (john 14:8);
 but the Lord showed him that God is the end, God the Trinity.  Accordingly, when you say "Christ is the end," you should not be excluding God the Father; and when you say, "God the Father is the end," you should not be excluding Christ.  Philip apparently wished to exclude him, supposing that Christ was only what he could see with his eyes, so he cheerfully said, Show us the Father, and it is enough for us.

What do you mean It is enough for us?

That's where our desire ends; we won't be seeking any further; that's where we shall find total satisfaction, where we shall say, "It's enough, I don't want anymore."
Why's that?

Because we already know you.  Please show us the Father.  Since we can see you, after all, and cannot see him, we aren't satisfied.  We are overjoyed because we can see you; but show us him, and we'll be satisfied; we won't require anything more.

And the Lord said to him, because he is himself the end, himself the one who totally satisfies, so in order to relieve him of what he was assuming--he was assuming, you see, that he wasn't seeing the Son of God, when he was seeing the form of a servant--so he said to Philip, Have I been with you all this time, and you have not recognized me?

When you are looking for the end, and do not see what you see, well that of course is why you are looking for the end, because you can't see the end standing in front of you. 

Do you not believe, he said, that I am in the Father and the Father is in me?  (John 14:9-10)