This confuses me.
In last week's Gospel, when Our Lord appeared to the Apostles, he breathes on them, filling them with the Holy Spirit.
If the Holy Spirit proceeded directly and only from the Father, why would the Gospel record Christ's ability to transmit the power of the Holy Spirit to the Apostles, in such a manner?
To which I replied: we only know the Trinity from its manifestation in the economy of salvation. That which is true in the temporal sense must be true in the eternal sense.
To that I got no answer.