ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈaɪv, hiː stˈɑːɹɾᵻd tə ɡˈɪv paɪənˈɪɹɪŋ kˈoːɹsᵻz ˌɔn nˈaɪntiːnθ ænd twˈɛntiəθsˈɛntʃɚɹi ɛsˈoʊtɹɪsˌɪzəm æt ðɪ ɪkˈoʊl pɹætˈiːk dˈɛs hˈɔːts ɪtˈuːdz.
In 1975, he started to give pioneering courses on nineteenth- and twentieth-century esotericism at the Ecole pratique des hautes études.