[Pooya/Ali Commentary 83:14] The Holy Prophet said that the heart of man, as created by Allah, is pure, but every time he does an ill-deed, it marks a stain on his heart. If he does not repent and thereafter live a righteous life, the stains deepen and spread more and more until the heart is sealed (Baqarah: 7) Imam Muhammad bin Ali al Baqir said: "The heart of a believer is as good-natured (spotless) as whiteness, but when he sins a stain appears on it, which disappears if he turns repentant to Allah and sins no more. In the event of continued sinning the stain spreads and covers the whole heart. He is lost and then no word of guidance brings him to the right path." Imam Jafar bin Muhammad as Sadiq said: "The hearts of those who pay no attention to the commands of Allah and persist in sinning, step by step, reach a state of decay and disintegration from which no recovery is ever possible." Aqa Mahdi Puya says: Willing surrender to the life of sin is the cause of the disintegration of soul, so it is the sinner who is responsible for his disgrace on the day of judgement.