Remember that no fear shall come upon the friends of Allah, nor shall they grieve. (Surah Hud, 10:62)

If a devotee purified his tongue and his other organs but at the time of spending money was negligent of his duty, his faith would not be perfect. Every bodily organ must get that part of faith which is related to it. The heart which is the chief of all organs should be kept busy with remembering the Names and Attributes of Allah and pondering over the Divine signs in men and the universe. That is the way how man's heart imbibes the spirit of faith. The Qur'an says: It may be noted that with the remembrance of Allah the hearts become satisfied. (Surah ar-Ra'd, 13:28)

When every organ has obtained its due share of faith, the devotee should intensify his spiritual effort and enter the domain of certainty and conviction by completing the stages of major Islam and major faith.

Those who believe and obscure not their belief by wrong doing, theirs is safety; and they are rightly guided. (Surah al-An'am, 6:82)

As a result of doing spiritual exercises the spiritual traveller will not only be placed on the right path, but will also become safe from the assaults of Satan.

Remember that no fear shall come upon the friends of Allah, nor shall they grieve. (Surah Hud, 10:62)