HEART AND QURAN

The holy QURAN regards the heart as an instrument of understanding and infact thegreater part of the QURANIC message is addressed to the human heart-- a messagewhich is audible to the ears of the heart alone, and is inscrutable to other receptive faculties. In the QURAN we reccuringly come across such notions as purification of the self, purity and enlightenment of the heart and purification of the heart in verses like:
PROSPEROUS IS HE WHO PURIFIES THE SELF ( 91:9).
NO INDEED, BUT THAT THEY WERE EARNING HAS OVERWHELMED THEIR HEARTS (83:14).
And about the salvation and enlightenment of the heart, the QURAN says:
IF YOU FEAR GOD, HE WILL ASSIGN YOU THE CAPACITY OF THE DISTINGUISHING (8:29).
BUT THOSE WHO STRUGGLE IN OUR CAUSE, SURELY WE SHALL GUIDE THEM IN OUR WAYS (29:69).
The QURAN recurring reminds that indecencies infect and darken the human soul and and deprive the human heart of sublime inclinations and virtious tendencies. At one place speaking on behalf of the believers, it says:
OUR LORD, MAKE NOT OUR HEART TO SWERVE AFTER YOU HAVE GUIDED US (3:8).
Describing the quality of evildoers the QURAN says:
NO INDEED BUT THAT THEY WERE EARNING HAS OVERWHELMED THEIR HEARTS (84:13).
About the darkness and injustice the QURAN says:
WHEN THEY SWERVED, GOD CAUSED THEIR HEARTS TO SWERVE (61:5).
About the sealing and hardening of the hearts the QURAN says:
GOD HAS SENT A SEAL ON THEIR HEARTS AND ON THEIR HEARING AND ON THEIR EYES IS A COVERING (2:7). EXAMPLE :TALIBAN, KING ABADULLAH etc.
WE LAY VEILS ON THEIR HEARTS LEST THEY UNDERSTAND IT (6:25).
SO DOES GOD SEAL THE HEARTS OF THE UNBELIEVERS (7:101).
All these verses point the fact that the HOLY QURAN recommends a sublime, spiritual atmosphere for mankind and it deems it necessary for every individual to strive to keep it clean and unpolluted.