whomever allah desires to guide he opens his breast to islam and whomever he desires to lead astray he makes his breast narrow and straitened as if he were climbing to a height. thus does allah lay defilement on those who do not have faith.
فمن يرد الله أن يهديه يشرح صدره للإسلام ومن يرد أن يضله يجعل صدره ضيقا حرجا كأنما يصعد في السماء كذلك يجعل الله الرجس على الذين لا يؤمنون