"In the Church, the Western tradition professes the consubstantial communion between the Father and the Son, by saying that the Spirit proceeds in eternity from the Father and the Son (filioque).It says this, "legitimately and with good reason", for the eternal order of the divine persons in their consubstantial communion implies that the Father, as "the principle without principle", is the first origin of the Spirit, but also that as Father of the only Son, he is, with the Son, the single principle from which the Holy Spirit proceeds."