Shaikh Syed Ahmed Kabeer Al Rifai said that I requested Shaikh Abdul Malik Al Herboni (Allah have mercy on them) for advice. He instructed
1. One who keeps looking left and right never achieves union (wisal).
2. One who has doubts seldom succeeds.
3. One who is not aware of his (spiritual) deficiencies all his time is spent in a deficient state.
Al Bayan ul mushyed, p120-1