Athanasius’s debate with the Arians was a lectionary-based discussion, if not explicitly, a least in a very practical way: it had to do with how the full range of the Scriptures in their apprehended juxtaposition disclosed the truth of God. I believe that Athanasius’s discussion is, on that basis, more credible than the Arians', because it is more comprehensive of the texts of the Scripture as they are made to perdure side by side. In our own day, it is such contiguity in temporal extent that has drastically shrunk. To that degree, the triumph of Arianism lies in the thinning out of the figural word, and thereby the dropping out of texts as divinely referring in their meaning and power. Heresy is the deliberated withering, far more even than the purported contradicting, of the Scriptures.

— Ephraim Radner, Time and the Word: Figural Reading of the Christian Scriptures, 233

Addendum:

The notion that Christian theology is to be seen as concerned with the mystery of God, the trinitarian God who loved us in Christ and calls us to participate in the mystery which he is, suggests to me that the main concern of theology is not so much to elucidate anything, as to prevent us, the Church, from dissolving the mystery that lies at the heart of the faith—dissolving it, or missing it altogether, by failing truly to engage with it. And this is what the heresies have been seen to do, and why they have been condemned: the trinitarian heresies dissolve the divine life, either by reducing it to a monadic consciousness, or by degrading it to the life of the gods; the Christological heresies blur the fact that it is in Christ that this divine life is offered to us—that it is through him and in the Spirit that we know ourselves to be loved by God himself—and do this either by qualifying the fact that God is who Jesus is, or by qualifying the fact that what Jesus is is truly a man; heresies concerning man’s divinization are no less insidious, as they blur the fact that we are truly loved by God in Jesus and are called to respond to that love, and that in thus loving and being loved we are drawn into a real communion with God.

— Andrew Louth, Discerning the Mystery: An Essay in the Nature of Theology