I guess even saints who aspire to be a role model for humanity need to learn how to walk upright. And that - as all other models - they do so by practicing with a book on top of their head. In this case, I suspect it may have been a Good Book.
The question remains whether the angel on top is helping out or complicating the ordeal… But I’ll leave that matter to the theologically inclined among my beloved readers.
[This picture comes from the portal of a church in Coruña, Spain]