Theology is not about angels dancing in pinheads; and theology has always been and remains the foundation of teaching. What the Church taught through the ages has changed, developed, evolved as much as and in tandem with theology. 

It is not true that the Trinity and Natures of Christ are found unambiguously in the NT (although they can be read back into the NT, as they have since the early Councils). Theology and teaching on Who God is, and Who Christ is, evolved in tandem. 

It is not true that our faith seen through the eyes of Aristotelian philosophy of the Thomists is my identical with our faith seen by the Fathers of the Church through the eyes of Platonism (actually, neo-Platonism). The Eucharist is superb example. Both Platonist eyes and Aristotelian eyes proclaim the "real" presence, but the meaning of REALITY assumed by those verbally identical proclamations hide a chasm of difference. 

I'm glad we concur on the Advocate; but her role does not mean simplistic stability.