The upholds the monarchy of the Father as the " sole Trinitarian Cause [ aitia ] or principle [ principium ] of the Son and the Holy Spirit . " While the Council of Florence proposed the equivalency of the two terms " cause " and " principle " and therefore implied that the Son is a cause ( aitia ) of the subsistence of the Holy Spirit, the distinguishes " between what the Greeks mean by'procession'in the sense of taking origin from, applicable only to the Holy Spirit relative to the Father ( ek tou Patros ekporeuomenon ), and what the Latins mean by'procession'as the more common term applicable to both Son and Spirit (; ek tou Patros kai tou Huiou proion ).
