Leaving aside any sort of "direct" action of God, there's the way kids affect their parents. I had the privilege and blessing of being the "primary care giver" of the 'orrible brat child (hereinafter OBC). And she was deathly ill and needed lots of care. And then when she started getting better the delerium of happiness and fun can scarcely be described. Whatever your theology is, I hope it's strong, because it will need to deal with the fact that more than once I, moiself, was cast as the Theotokos in little plays the OBC put on. And spent happy hours doing the shopping while lugging her around in the baby backpack in the supermarket and giving a running commentary on what I was doing, while people looked at me as though I was a few fries short of a happy meal.
The OBC changed me. Attentiveness to the OBC changed me. And my point is, imagine that the OBC was God the Son of God. How much did that change our Lady?
Hint: A LOT!
The other issue is that God seems to like delegating. I see more and more that there is the issue of monotheism and the number of ways to be monotheistic. And some of us think that any homage given to any saint is somehow an attack on God's not only being Prime, but also being, well, God.
I wonder, does God NEED a Bible?
Of course. This is the meaning of Luke 11:28.