Fr Ambrose:
Because the Orthodox faith denies these things and your assertion was that “that only leads me to conclude that there is no difference in our belief.” Ergo, if there is no difference in our belief, you should affirm and deny the things which the Orthodox either affirm or deny.
But suppose we do deny that the Holy Spirit takes His origin in any way from the Son? Surely, the simple use of the phrase “from the Father and the Son” cannot be heterodox. Consider the following:
*"[T]he goodness of [the divine] nature, the holiness of [that] nature, and the royal dignity reach from the Father through the only-begotten [Son] to the Holy Spirit. Since we confess the persons in this manner, there is no infringing upon the holy dogma of the monarchy" (The Holy Spirit 18:47 [A.D. 375]).
– St. Basil the Great
“[The] Father conveys the notion of unoriginate, unbegotten, and Father always; the only-begotten Son is understood along with the Father, coming from him but inseparably joined to him. Through the Son and with the Father, immediately and before any vague and unfounded concept interposes between them, the Holy Spirit is also perceived conjointly” (Against Eunomius 1 [A.D. 380]).
– Gregory of Nyssa
“Since the Holy Spirit when he is in us effects our being conformed to God, and he actually proceeds from the Father and Son, it is abundantly clear that he is of the divine essence, in it in essence and proceeding from it” (Treasury of the Holy Trinity, thesis 34 [ca. A.D. 424]).
– St. Cyril of Alexandria
“The Spirit of the Word is like a love of the Father for the mysteriously begotten Word, and it is the same love that the beloved Word and Son of the Father has for the one who begot him. That love comes from the Father at the same time as it is with the Son and it naturally rests on the Son.”
–St. Gregory Palamas, Chapters, 36 (PG 150:1144D-1145A).*