The Liturgy of St. James is renowned as being one of the oldest liturgies in Christianity, supposedly going back all the way to the apostle James the brother of the Lord. Although the liturgy is reputed to have an apostolic origin, it continued to see modification for several centuries, the version used today perhaps dating back to the fifth or sixth centuries.
Because of such modifications to an ancient document, it is of course difficult to ever say with absolute certainty what is original and what is not. Certain things can easily be conjectured to be additions however as they bear the mark of later theological controversies that a first century liturgy would not have spoken to. The language in many places is seen to date from the post-nicene era.
One such instance of an anachronism in the liturgy is that its second paragraph is expressly semi-modalistic, something otherwise unheard of in orthodox churches in the ante-nicene era. It says:
“II Glory to the Father, and to the Son, and to the Holy Spirit, the triune light of the Godhead, which is unity subsisting in trinity, divided, yet indivisible: for the Trinity is the one God Almighty, whose glory the heavens declare, and the earth His dominion, and the sea His might, and every sentient and intellectual creature at all times proclaims His majesty: for all glory becomes Him, and honour and might, greatness and magnificence, now and ever, and to all eternity. Amen.”
A more explicitly semi-modalistic statement would only be possible if it came right out and called the Trinity as a whole a “person” (like Cornelius Van Til did: https://contramodalism.com/2018/01/15/van-tils-views-on-the-trinity/ ).
We see that this liturgy expressly contradicts the Nicene Creed, which begins by defining the one God of the Christian faith as the person of the Father saying “We believe in one God, the Father Almighty…” Instead the Liturgy defines the one God as the Trinity itself.
That the Trinity is treated as a single person is also abundantly clear, as it goes on to use singular personal pronouns such as “his” for the Trinity several times.
It is sad to see semi-modalism encapsulated in the Liturgy which is perhaps in its original form the oldest liturgy we have still in use. The liturgy of St. James is commonly used by various Eastern churches, including the Syriac Orthodox church and occasionally by the Eastern Orthodox Church, which despite this part of its liturgy, is actually making great strides in returning to classical trinitarianism such as that articulated by the Nicene Creed (see: https://contramodalism.com/tag/eastern-orthodox/ ).