Compare Escher’s Liberation to this close-up
of a portion of the cover of The Winged Shoes of Emydio Alves.
Both show birds of negative space in transformational ascent.
In Gödel, Escher, Bach the author points to Escher’s Liberation and asks this question about the birds…
Do they suffer as much from being crystallized into a rule-obeying system?
Perhaps breaking free of the rules is the point.