Philoxenus - A Credal statement

I believe in a Trinity, a Trinity which can neither be reduced nor diminished to Two [Persons], nor added unto so that it becometh Four [Persons]. Nothing from the fulness thereof can be diminished, neither can it receive any other person from without. Everything which is outside this Trinity hath been created, but whatsoever is contained therein hath been from everlasting. And it is adorable; nothing outside of it is to be worshipped, and within it there is nothing which worshippeth. Outside of it there is no other God at all, neither inside of it is there a man that hath been made. It diminisheth not in its Person, neither doth it add thereunto. In it, which hath existed for ever, there never began [to exist] a Person, and there doth not pass away therefrom a Person who hath come to an end.

Now therefore, one of the Persons of this Trinity came down by the mystery of depletion, and of the Holy Virgin became man. Inasmuch as He was God, His nature was not changed in its being, and no addition to His Person took place, but He remained the Only-begotten, even after He had taken upon himself a body. For the act of coming into being did not introduce into the Only-begotten another first-born, but shewed that the firstborn of the Virgin was the Only-begotten of the Father; for He, Who was the Only-begotten through His birth from the Eternal, Himself became the firstborn by His birth of the Virgin, And since God the Word, Who is of the Virgin, is the Only-begotten, and since because He became man of the Virgin He is the firstborn, the Only-begotten is the firstborn, and the firstborn is the Only-begotten. And being Himself God, He is Son of God [and] Son of man; and Son of man [and Son of] God; Son of the Eternal [and] Son of the Virgin; Son of the Virgin [and] Son of the Eternal; the concealed revealed, and the revealed concealed; a spiritual corporeal Being, and a corporeal spiritual Being; a finite infinity; Who was upon the throne and was in the womb;

Who was in the womb and was upon the throne; Son of God Son of man; Son of man Son of God; the visible invisible; the concealed and invisible visible; the passible impassible; the impassible passible ; the dead living, and the living dead ; Who being in heaven was in Sheol, and Who being in Sheol was in heaven. The Only-begotten is One Who hath no number among those who belong to heaven or among those who belong to earth, for the attributes of the Only-begotten belong to the Only-begotten, and not unto various others, as those who are in error say. For do not exalted things belong to the exalted? and lowly things to the humble? and divine qualities to God? and human attributes to man? But to the exalted one who hath been abased belong lowly things; and of the God Who became man we must believe human things; of the hidden One who became revealed must we believe all contemptible things ; and to the infinite God Who of His own will became mortal man, and Who yet remained immortal God in His nature, belong suffering and death. One of the Trinity became the Only-begotten of the Father, the Word God became the Son of man by the Virgin by taking upon Himself the body of our Nature, the nature of the Word remaining unchanged, and He Himself, One God, Who was of God, suffered and died for us. And because He became the Son of Man, and remained [so] in His life and also in His death even as He continued in His unchanging and eternal Being, He was also man in His Being.