Of course, the Son of God did not consign Himself to a material body or mingle human deeds with divine ones on a whim. He did this, together with the miracles that He performed in the body, in order to obey the will of God. But the fact that He could organize and work divine purposes through a human body in a pure and marvelous manner shows that he created Himself as a man with a material body, and thus created all matter with the capacity for being filled and used to manifest His divine Person.
And He raised men through grace to become sons of His heavenly Father through the fact that He Himself was the only begotten Son of the heavenly Father. If there were no Triune God–a God who was the Father, Son and Holy Spirit–He could not have done this. The raising of man from the prison of his nature is possible thanks to the fact that God exists in Trinity. (Dumitru Staniloae, The Holy Trinity, pp. 112-113)