Abstract
The figure of chiasmus, which plays a key role inside Merleau-Ponty’s thought, makes it possible to address the way Castoriadis defines the imaginary throughout his entire work from a new perspective, as well as to shed light on some complexities concerning the relation between instituted and instituting. Tthis article emphasizes the intertwining of three pair of concepts, each of which corresponds to a different but yet interrelated aspect of his philosophy: psyche-society, tradition-innovation, and autonomy-heteronomy.