Taqwa causes a believer to attain knowledge, and it is the key to knowledge.

Taqwa causes a believer to attain knowledge, and it is the key to knowledge.

..fear Allah; for it is Allah that teaches you..{2:282}. 

* 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}.