Taqwa, causes the servant of Allah to be Successful in distinguishing the Truth from the Falsehood, and to have knowledge of each one of them.

Taqwa, causes the servant of Allah to be Successful in distinguishing the Truth from the Falsehood, and to have knowledge of each one of them.

O ye who believe if ye fear ALLAH, He will grant you a Criterion (to judge between right and wrong). remove from you (all) evil deeds and forgive you..{8:29}. 

Light Provided by Allah for believers to walk straight. 

  O ye that believe fear Allah, and believe in His Messenger, and He will bestow on you a double 

  portion of His Mercy: 

* He will provide for you a Light by which ye shall walk (straight in your path), and 

* He will forgive you (your past): for Allah is Oft-Forgiving, Most Merciful.{57:28}.