Aphrahat of Assyria is not a household name in Western Christianity, but his Demonstrations serve as a valuable window into the theology and practice of the churches of the middle east around the time of the Nicene Council. By the time of the council, the Christian church stretched from Britain in the West to India and China in the East, and had not yet been divided by the later schisms that have left so many churches cut off from one another. In English, at least, it is difficult to find the writings of ante-nicene and Nicene era Christian authors who lived farther East than Persia. Most of those commonly known in the West today come from Europe, North Africa, and the Western edge of the Asian continent. Who knows what excellent theologians may have lived in the ancient churches of India and China, today unknown to later generations.
Aphrahat’s writings prove themselves a rare treat to Western Christians as a chance to peer into the often overlooked but enormous ancient churches of the East, where Syriac, instead of Greek or Latin, was used by the churches.
Aphrahat of Assyria, however far he was geographically from other orthodox fathers we may be familiar with such as Irenaeus of Lyons (modern-day France), was not far from them at all in his theology. Like Irenaeus and the fathers at the Nicene Council, Aphrahat taught that the one God is very same person who is the Father of the Lord Jesus Christ:
“For if they worship, and honour with the name of worship, the heathen— those who in their heathen wickedness deny even the name of God — and yet do not worship them as their maker, as though they worshipped them alone, and so do not sin; how much more does it become us to worship and honour Jesus, Who converted our stubborn minds from all worship of vain error, and taught us to worship and serve and minister to the one God, our Father and our Maker. ” (Demonstrations, on Jesus Christ the Son of God)
We see Aphrahat express the classical trinitarian belief that men are brought by the Lord Jesus Christ to the one God, Who is our Father and Creator. The one God is not to Aphrahat the Trinity conceived of as though it were a single person, but rather the one God is explicitly the person we know as Father, to Whom the Lord Jesus Christ stands in relation as His only-begotten Son, and the Holy Spirit as His Spirit.
Aphrahat’s belief on this important point of doctrine stands in agreement with both scripture and the teaching of other orthodox fathers of the ante-nicene and nicene eras, as can be see here: I believe in one God, the Father Almighty