I’ve heard this theory before, however I really can’t see the justification for a temporal only double procession… And in fact, given what is said here of Photius I really don’t know that I would consider that a “double procession” in any sense (through the Son)…
I realize I’m throughly Latin in my thinking, so perhaps this is my “handy cap” as it were in viewing the issue. But given particularly the depiction of the Holy Trinity as presented in the end of revelation I really and truely can not see anything other than an eternal procession as described by the Latin Fathers, or some compatible form from the Eastern Fathers.
At least thats me.
It is dogma that there are two internal processions.
The dogma of the Lateran Council IV (1215) expresses the issue of difference with the Orthodox:
‘The Substance does not generate, is not begotten, does not proceed; but it is the Father who generates, the Son who is begotten, the Holy Spirit who proceeds: so that there is distinction in Persons and unity in Nature. Although other (alius) is the Father, other the Son, other the Holy Spirit, they are not another reality (aliud), but what the Father is the Son is and the Holy Spirit equally; so, according to the orthodox and catholic faith, we believe that they are consubstantial. For the Father, generating eternally the Son, has given to Him his substance …
It is clear that, in being begotten the Son has received the substance of the Father without this substance being in any way diminished, and so the Father and the Son have the same substance. So the Father, the Son and the Holy Spirit, Who proceeds from them both, are one same reality"
(
Denzinger-Schonmetzer 804-805,
Enchiridion symbolorum, definitionum et declarationum de rebus fidei et morum.)
432 We, however, with the approval of the sacred Council, believe and confess with Peter Lombard that there exists a most excellent reality, incomprehensible indeed and ineffable, which truly is the Father, and the Son, and the Holy Spirit, at the same time three Persons, and anyone of the same individually; and so in God there is Trinity only, not a quaternity; because any one of the three Persons is that reality, namely, substance, essence or divine nature, which alone is the beginning of all things, beyond which nothing else can be found, and that reality is not generating, nor generated, nor proceeding, but it is the Father who generates, the Son who is generated, and the Holy Spirit who proceeds, so that distinctions are in Persons and unity in nature. Therefore, although “one is the Father, another the Son, and another the Holy Spirit, yet they are not different” * but what is the Father is the Son and the Holy Spirit entirely the same, so that according to the true and Catholic Faith they are believed to be consubstantial. For the Father from eternity by generating the Son gave His substance to Him according to which He Himself testifies: “That which the Father has given to me is greater than all things” [John 10:29]. But it cannot be said that He (the Father) has given a part of His substance to Him (the Son), and retained a part for Himself, since the substance of the Father is indivisible, namely, simple. But neither can it be said that the Father has transferred His substance to the Son in generating, as if He had given that to the Son which he did not retain for Himself; otherwise the substance would have ceased to exist. It is clear, therefore, that the Son in being born without any diminution received the substance of the Father, and thus the Father and the Son have the same substance, and so this same reality is the Father and the Son and also the Holy Spirit proceeding from both. But when Truth prays to the Father for His faithful saying: “I will that they may be one in us, as we also are one” John 17:22]: this word “one” indeed is accepted for the faithful in such a way that a union of charity in grace is understood, for the divine Persons in such a way that a unity of identity in nature is considered, as elsewhere Truth says: “Be . . . perfect, as also your heavenly Father is perfect” [Matt. 5:48 ], as if He said more clearly, “Be perfect” in the perfection of grace “as your heavenly Father is perfect” in the perfection of grace, that is, each in his own manner, because between the Creator and the creature so great a likeness cannot be noted without the necessity of noting a greater dissimilarity between them. If anyone, therefore, shall presume to defend or approve the opinion or doctrine of the above mentioned Joachim, let him be refuted as a heretic by all.
(
Denzinger 432,
Enchiridion Symbolorum et Definitionum)