In Regis 1962 (Lecture 7, section 3.4: The Light of Faith) Lonergan says that, by lumen fidei, he does not mean something like Rouselot's les yeux de la foi, because Rousselot does not have (Lonergan's) sharp distinction between What is it? and Is it so? Faith, Lonergan goes on, does not involve understanding anything. We believe, not because we understand, but because of the authority of God.
But in Method in Theology, faith is no longer assent to truths, and Lonergan does go on to speak of faith as the eye of love.
Is there something to be deepened here? What kind of shift is that? Anything substantial?