http://tazkiyatips.blogspot.co.uk/2012/12/3-things-that-prevent-one-from-self.html

There are three dangers which may prevent you from examining yourself and taking account of your acts.

The first of these dangers is heedlessness.

The second is the flood of tastes and desires that gush from your ego, your lower self.

The third is bad habits, in fact all habits, which make one like a machine.

The one who can protect himself against these three dangers, with Allah's help, will find salvation in both worlds.

-Shehu Abdul Qadir D.B.