Homilies and Songs, Volume 1

...proper. For by the force of that union through love, notwithstanding the double hypostasis, Narsai says that now not two Sons are to be spoken of, but one, and this is the Son of God, from the Word and the man. How? The son of man in Christ, even if he enjoys his own personality, by the force of love, however, does not act except under the influence of the Word, with whom he perfectly agrees in acting, so that the actions, by the force of that influence, even if they are of the human subject, are nevertheless, regarding the excellence shared by the Son of God, entirely divine in some way and satisfactory in the work of Redemption. Narsai illustrates that moral union many times, calling it at one time the union of indwelling, at another of friendship, at another of the communication of excellence, etc.

That therefore, according to Catholic doctrine, the human nature does not necessarily need its own personality, but can subsist in another, and indeed in a more excellent way, of this the Doctor knows not even a little, nor has he suspected it; therefore he beats the air every time he attacks the Catholics, wrongly confused with the Eutychians.

As regards the procession of the Holy Spirit from the Son, he seems to deny it implicitly, even if no formal text can be alleged, except that when the occasion arises, the Holy Spirit is asserted to proceed simply from the Father, the Son being passed over (1).

He judges that the Beatific Vision, regarding the just, is deferred until the day of resurrection, in his homily on the soul and passim (2).

Finally, he dared sometimes to assert one will in Christ (3). But evidently this is about one moral will, according to the mind of the Narsaiian doctrine exposed above.

Here it is also helpful to note that he, like the other Syrian doctors, is persuaded that the transubstantiation of bread and wine in the Most Holy Sacrament of the Eucharist does not occur through the evangelical words: "this is my body" etc., but through the Epiclesis, or through the invocation of the Holy Spirit (4).

(1) "That there is one power from the Father: which equality goes forth at all times: in the Son and in the Spirit..."
(2) "In the Garden of Eden (terrestrial paradise) the dwell of the righteous, his sons not in the paradise of pride... not that he commanded the souls of the lost instead that they are sighing: but that souls with bodies on the day of resurrection. Nor that it has no power or loss of losses: but that the goings down which are not known to man how much."
(3) "And he is one in his will (Christ): in unity and peace and will. Which is mercy and love. Like the life that is his one in one."
(4) "He invites the Holy Spirit to complete all the excellencies: and he completes the justification and the body and the holy blood he completes."