the refusal of all the spiritual forms that can be designated by the term initiationism or esoterism marks the starting point of laicization and socialization… this laicization or secularization goes far deeper than the separation or non-separation of the ‘temporal power’ and the ‘spiritual power’
Corbin argues that secularization originates not in political church-state separation but in the systematic rejection of esoteric and initiatory spirituality within both Christianity and Islam.
, Alone with the Alone: Creative Imagination in the Sufism of Ibn Arabi, 1969thesis