How does a seeker become heedless of God?
The Prophet Mohammad said, 'When somebody sins, the angels record the sin in the book of deeds and at the same time, places a black spot on the heart. With abundance of sins, one day the heart turns all dark. At this stage, no advice is effective on the sinner.'
The companions of Prophet Mohammad asked, 'What should be done at this stage to remove darkness from the heart?'
He replied, 'There is a means of cleansing for everything; whereas for the heart, it is Dhikr Allah (Invocation of God's Name).'