As an aside, Heber, and ContraMundum, I gather from the entirety of scripture that there is an emptying of self not only in God the Word / Messiah (Philippians 2:8) but also the Spirit who must search the mind of the Father (1 Corinthians 2:11) apparently to deal with temporal beings (humanity). That the Father remains on this higher plain of existence which is how his is the final authority to which the Messiah and the Spirit submit.
And while the Father is aware of all things and in touch with all things we cannot relate to him directly because he is so alknowing and above it all.
If this is correct, then God the Word (Messiah) is the one with whom mankind has been dealing directly all along. And that the only thing new about going through him (in his name) in prayer or deed is our knowledge through the revelation that this is what has been going on all along.
And this would sure answer some questions in texts about God seeming not to know something at times... John 5:19ff may only be in reference to the incarnation but it may also refer to his "emptied" state (Philippians 2:8) note that despite the self-imposed limitations listed... the Son has the ability to do what the Father can do (in John 5).
When Yeshua walked this earth he was subordinate to his father because Yeshua, although still G_d, was by his own choice as a man and so, to experience what we experience, he had to submit to being subordinate, as we are. The Spirit always searches the things of G_d because his job is to point us to the Word, to enable us to pray effectively, and to give us the gifts that G_d wants us to have etc etc. He must therefore always be looking to G_d although he is an integral part of the G_d-head, as is Yeshua; he is the gift that resides within us to enable all these things, because he is Spirit. All this would explain why Yeshua did not know everything - he was living under the same restrictions as us.
This has major implications for those who see, for example, that he knew exactly who would betray him well in advance, because he was G_d.
We can relate directly to the father - that was the whole point of the Temple curtain being torn in two from the top to the bottom - we do not need a middle man (priest, minister, rabbi etc etc). Sadly the father often gets missed out but we pray to the father, in the name of Yeshua, by the power of the Ruach HaKodesh who, when we do not know what to say, speaks for us by looking in our hearts.
The son can do only what the father says because the son is still G_d; even though he was 'as' man in every way except that he could not sin, neither could he go against what G_d required (see the Garden of Gethsemane experience - it's about subordination whilst he was as one of us). Therefore, being subordinate to the father, he says and does only what the father says and does. Hasatan, on the other hand, can only copy G_d -he cannot initiate anything that G_d can do. That is why we had a Bar Abba* on trial at the same time as Yeshua - two men who were called Son of the Father for the crowd to choose from; one was really the Son of the Father and the other was hasatan's copy! That is why Sha'ul tells us to test every spirit - is it a fake from hasatan or the real thing from G_d? The Bank of Engand fraud department only ever study the
real coins and notes so that they can spot a fake a mile off (note that they
do not study the false things), so we must study G_d in scripture so that we can spot a copy by hasatan a mile off, unlike the people of his day who voted to save the wrong Son of the Father, as G_d knew they would.
*Believe it or not there never was a man named Barabbas who was set free in place of Yeshua.