the ultimate challenge for an artist...
how to confine the outpouring of the Holy Spirit in a 2d or 3d space
When I was a church elder, often I was asked to deliver sermons when the senior pastor was away. Then, I learned firsthand that while I am gifted to teach, I am not gifted to preach.
As I consider the challenge you outlined, I realize I am not gifted to be an artist, because I have no inkling how I would solve it--whereas a gifted artist would. In that sense, then, I realize that Bernini and those like him are gifted visual preachers.