In order to understand what they need to understand, in order to write what they write, they have to be free. And yet, they aren't ever free. They are not free because they are not free of the constrictions their art puts on them.
“It is even possible that laws which have not their origin in the mind may be irrational, and we can never succeed in formulating them.”
“The practice of medicine is a thinker's art the practice of surgery a plumber's.”