There is a paradox in this last statement which we must now examine. The Word was not hedged in by His body, nor did His presence in the body prevent His being present elsewhere as well. When He moved His body He did not cease also to direct the universe by His Mind and might. No. The marvelous truth is, that being the Word, so far from being Himself contained by anything, He actually contained all things Himself. In creation He is present everywhere, yet is distinct in being from it; ordering, directing, giving life to all, containing all, yet is He Himself the Uncontained, existing solely in His Father. As with the whole, so also is it with the part. Existing in a human body, to which He Himself gives life, He is still Source of life to all the universe, present in every part of it, yet outside of the whole; and He is revealed both through the works of His body and through His activity in the world. It is, indeed, the function of the soul to behold things that are outside the body, but it cannot energize or move them. . . With the Word of God in His human nature however, it was otherwise. His body was for Him not a limitation, but an instrument, so that He was both in it and in all things, and outside all things, resting in the Father alone. At one and the same time—this is the wonder—as Man He was living a human life, and as Word He was sustaining the life of the universe, and as Son He was in constant union with the Father. Not even His birth from a virgin, therefore, changed Him in any way, nor was He defiled by being in the body. Rather, He sanctified the body by being in it. For His being in everything does not mean that He shares the nature of everything, only that He gives all things their being and sustains them in it. Just as the sun is not defiled by the contact of its rays with earthly objects, but rather enlightens and purifies them, so He Who made the sun is not defiled by being made known in a body, but rather the body is cleansed and quickened by His indwelling. “Who did no sin, neither was guile found in His mouth.”    

On The Incarnation - Athanasius