Sinful, immoral qualities are grasped in this perspective not only as vices but also as so many blind spots or intellectual dysfunctions. The heart is ‘diseased’ by vice, its ‘eye’ blinded by them and thus unable to ‘see’ the Real. As is said in the Qur’ān, ‘In their hearts is a disease and God increased them in disease’ (2: 10), and ‘It is not the sights that are blind, but blind are the hearts’ (22: 46).
