Firstly this is what God has revealed to us, that He is Triune, and there is no hint that he is more persons than this.
I agree that there is ‘no hint’ of further persons, at least that I have been able to find. My question though is about ‘could’, and an unhinted at thing ‘could exist’ despite the lack of hints. I am not sure I agree that a Catholic can confidently say that "God has revealed himself as Triune - it seems to me that ‘at least Triune’ is the most parsimonious description of the facts.
Second John 1:14 Speaks of Christ as the only Begotten of the Father, here only begotten does not carry the connotation of “only begotten son” simply “Only Begotten”. Such a relationship would effectively Rule out another Person in the Trinity.
Best authority from scripture so far! Although I came across several versions using ‘son’.
The Trinity is Trinity only in Relation to the Other members of the Trinity, that is God the Father is God by Nature/Substance and Father by Relation to the Son and Spirit(and Vice versa).
I can’t work out if this persuades me or if it is an argument of the "God is perfect, therefore he exists’ type (which doesn’t)
The Spirit is unlimited, and eternal, Procession between Father and Son. For there to be another Person in the Trinity there would need to be either another begetting (not happening as per Jn 1:14) or another procession. but since the first is unlimited and eternal and so a complete procession between Father and Son where would the other procession of Divine Person be processing? faced with this we can also rule out subsequent processions without subsequent persons which Jn 1:14 of course likewise rules out.
This I get, given that ‘processing’ is a formmal part of Catholic belief - it seems logical to me, provided we accept Jn 1:14 as having the meaning ‘only one offspring’.
As God has not hinted at another person nor another relation of Persons within the Divine substance I see no reason nor evidence to suggest subsequent persons in the Trinity.
This I agree with - but remember I am saying ‘could’.