Shaykh Ahmad Zarruq ...

The claim of the claimer is known by its result ... 
If the claim manifests itself then it is correct ... 
Otherwise, the one who alleges his claim is a liar ... 

Tawbah not followed by godfearingness (Taqwa) is considered unaccepted ... 
Taqwa not free of doing wrong actions (Istiqama) is admixed and imperfect ... 

Istiqama without scrupulousness (Wara') is incomplete ... 
Wara' that is not a result of Zuhd is limited ... 

Zuhd that is not built upon trust in Allah (Tawakkul) is dry and dead ... 

Tawakkul whose fruits do not manifest by completely cutting off everything that does not lead to Allah and referring to Him, is a picture without truth in it (It is a form without reality) ... 

So, sound Tawbah manifests through the servant turning away from the forbidden (Haram) ...

Perfection in Taqwa manifests through the servant finding no observer except Allah ...

Istiqamah exists through the servant taking precautions to perform his religious exercises (Wird) without innovation (bid'a) ... 

And Wara' exists when the servant, at the point of experiencing strong desires for something that may be unacceptable, leaves it ...