Karl Friston.
He is one smart biscuit...
His ideas are very simple and straightforward, but the way he used mathematical concepts to make these idea concrete tools is not simple at all though but not so much difficult than it seems at first sight...
His idea to describe perception and action at all levels with the concept of " Markov Blanket" neutralizing then the DECEPTIVE ILLUSORY SEPARATION between all levels of life and lifting the wall between subject and object by a deep mathematization of the polarites between inside flowing of information and the outside flowing of action at all levels of living systems is a complete revolution...
No materialism is possible and no solipsism ....
It is a return to Spinoza and Goethe and Cassirer against nominalism against after that Descartes dualism, against Kant transcendental representation, against all materialist "naivete" that reign supreme in the last 2 centuries....
It is a return to the RELATION that makes all life only ONE net of beings in a hierarchical reflexion of integrating and interacting minds/body polarities levels organizations...
That is my take on Friston...
But trust me so great genius Friston is and he is, Goethe contains more ideas and all Friston concepts are in Goethe already...Only his particular mathematization of his polarities was Friston gift to Goethe...
Take a look to Wolfgang Schad who use Goethe method to describe all mammals shapes details in a book about their articulate morphology in relation to the polarities between the three main physiological system : the polarity of nerve-sense and metabolic-limb systems and the mediating circulatory-respiratory system...
The polarity of Friston about inflowing information and outflowing action are complementary choices of polarities in relation to the goethean Perspective...But the 2 approach are based on the ultimate interprenetrating polarities between outside and inside and subject and phenomena anyway....
Polarities in general being, not external dualities, but internal dynamic and/or reflecting an internal dynamic are not always bi-polar and could be multi-polar...They are reflected internal details or parts of the WHOLE manifested in symbolic forms polarities...Through what Friston called "Markov blanket"....
Wolfgang Schad book:
http://www.adonispress.org/threefoldness.php
My deepest respect to perhaps someone linked by blood line to the great philosopher and mathematician Hoené Wronski... 😊