“According to your faith be it done to you.”
Which means, it seems to me, that the Son of God is able to be, in one sense, anything at all. He is able to because he is inexhaustible.
Now Divine Inexhaustibility is not usually construed as an attribute, but it is the corollary of Divine Infinity: God is an infinite being, and there is a sense in which you cannot expect too much of him. I do not mean that God is anything at all, whatever you please, but that you cannot possibly think too well of God: whatever good you can think, he is beyond it more. He is best and greatest to an incomprehensible because absolute degree.
The two blind men in Matthew 9:27-31 hear these words from the Lord, and I think the point of the saying is to demonstrate that Christ is the healer of the blind because this is nothing to him. He came to do greater things, but in his condescending to come at all he will not avoid the lesser task: it is nothing to him and it is much to them. How much, though?
Our Lord spoke of faith as a kind of spiritual understanding—I think that is the point of saying it is great or small: you understand much or little in terms of the object: himself. It seems to me that is one of the things going on in the Gospel according to Matthew, faith as spiritual understanding. According to your spiritual understanding be it done to you, we might paraphrase.
And it goes for understanding Scripture because there is no separating of Christ from it. Christ is spiritual reality, just as, to illustrate from something else, Nous is the intelligible realm where the objects of intellection are located. The objects of faith are not bare objects but instead a subject who comprehends all there is spiritually to understand. Faith is personal and participative, then, and that is why you see two men shouting, being led into a house, and opening for the first time their eyes to look on . . . what? On the Savior; that is simply how it is, and it is inexhaustibly much.