Three things inevitably demand the attention of every believer under all circumstances:
A commandment to be obeyed,
a prohibition to be respected,
and a divine decree to be accepted with good grace.
In even the most trivial situation, at least one of the three is bound to apply. The believer must therefore keep his mind and feelings focussed upon them, talk to himself about them, and practice the physical discipline they require of him all the time.
Shaikh Abd'al al-Qadir al-Jilani,
in Futuh al- Ghaib," Revelations of The Unseen ".
Translated from Arabic by Muhtar Holland.