I suppose we really need to address that giant elephant in the room. That single Latin word
filioque. Translated into English as "and the Son", that single word which almost singularly divides the entire Church on earth between East and West.
The controversy over this one word is literally the subject of volumes of books. But what it has meant has resulted in numerous charges thrown both directions.
Those who say the Spirit proceeds from the Father only have charged the Filioquists of arguing that the Spirit is subordinate to the Father and the Son; a sort of Diarchy of Father and Son with the subordinate Spirit.
Those who say the Spirit proceeds from both the Father and the Son have charged non-Filioquists of arguing that the Father, in a sense, has "two sons", or that the Son and Spirit are subordinate to the Father.
And thus the fundamental theological confusion and issues have largely been charges of Subordinationism--a long rejected theological framework of speaking of the Trinity; and the issue of Triadology; the very way we speak of God's Three-ness and the interior perichoresis of the Three.
In the West Trinitarian language focuses first on the Nature, the Essence of the Godhead, namely the Oneness of God's Being; and then goes on to speak of the Three sharing in that singular, undivided Essence.
This has at times perhaps resulted in some being confused. For example some may imagine a kind of "four-ness", particularly if one takes something like the Scutum Fidei too literally:
It could be misconstrued as though "God" here is a sort of "fourth thing" that is then extended to the Three. By abstracting the Divine Essence out from the concreteness of the Three, we may in some sense be de-personalizing what we mean by "Deity".
Whereas in the East the focus has been to speak of the Three and the inter-relatedness, "their" perichoresis, and to speak of the Divine Unity out from the Three.
I won't attempt here to speak on behalf of the Eastern Theological tradition, but my own thoughts are something like this:
Rather than speaking of an abstract notion of the Divine Essence which the Three then consequently share; it may indeed be very preferable instead to begin first with the concreteness of the Three--to speak definitively of the Father, the Son, and the Holy Spirit. That is, we must first speak of the Father, when we say "the Father is God" we are not saying "There is a substance which the Father possesses which makes Him God", we are instead saying the very reality, the very nature, essence (ousia) that makes God
God is, indeed, the Father. And it is from there that we then speak of the Eternal Generation of the Son, the Son is God not because He "possesses" a substance that makes Him God, but because He has His eternal origin in and from the Father--with neither beginning nor end--and He is therefore God from God, Light from Light, true God of true God.
And thus to speak of the Divine Nature or the Divine Essence cannot be an abstracted thing, but must be more concrete than that.
Which then makes the non-Filioquist position a far more understandable one. For here we speak of the Father, the Unoriginated Source and Origin, the very "Fount of Deity". And there is His Word and Spirit. Not in a subordinate sense, but rather we must speak of the Three, and then it is actually there in the Threeness we then speak of the Oneness.
God is One because God is Three.
Though, again, my own thoughts here. I don't regard the Filioque
bad. I think the intent the West had by speaking of the Spirit's procession from both Father and Son was most indeed good. So I don't have a problem confessing the Creed with the Filioque--and I do whenever it is recited in church. The Western Church had been speaking of the double-procession of the Spirit for hundreds of years before the Filioque's sorta-kinda-official inclusion between the 9th and 11th centuries. And it wasn't necessarily a huge problem back when St. Augustine and many of the Latin Fathers were talking like that. Because they were doubly safeguarding the Divinity of the Son--Arianism remained very alive and well in the West among the Goths, in particularly the Visigothic Kingdom in Spain.
And also, it should not be itself a problem to speak of the Spirit as proceeding from the Son, though it largely depends on what we mean by this.
Needless to say. It's kind of a big deal even to this day.
-CryptoLutheran