In many of his writings, Castoriadis argues that ‘the discovery of the imagination’ occurs in the works of Aristotle, Kant, Fichte, Freud, Heidegger and Merleau-Ponty. Although he has systematically encountered and interrogated the works of Aristotle, Kant, Freud, and Merleau-Ponty, the work of Fichte remains an enigmatic absence within the orbit of Castoriadis' work. This study is an attempt to address this enigma through a close reading of Fichte’s The Science of Knowledge.