SHAFAQNA – Ayah 10 of Surah Ar-Roum says: “Then their evil acts resulted in rejecting and mocking God’s revelations.” In this regard, It is narrated from Imam Sdaeq (AS) who said: My father used to say: Nothing more than sins corrupt the heart, heart commits sin and insist on it, and consequently falls down and is turned upside down and is not affected by any advice . In another narration, Imam Kadhim/Kazim (AS) said: When the human being commits a sin, a black spot is formed in his/her heart; if he/she repents that spot will be removed, but if continues committing sins that spot is spread to all of his/her heart and after that he/she will not be saved . Imam Baqir (AS) also said: No calamity is inflicted on the human being except by committing sins .
 Kafi, Vol. 2, Page 268.
 Beharul Anwaar, Vol. 73, Page 327.
 Kafi, Vol. 2, Page 269.