There's a necessity for physical experience and a recourse to exemplary cases of bodily ascesis to understand and make understood a type of emptying of the mind, an emptying that is required if the mind is to think. This obviously has nothing to do with tabula rasa, with what Descartes (vainly) wanted to be a starting from scratch on the part of knowing thought.
p. 296 - Thought Without a Body? (1994)