the believers are only those whose hearts thrill with fear when allah is mentioned and when his revelations are rehearsed unto them they increase their faith and who trust in their lord.
إنما المؤمنون الذين إذا ذكر الله وجلت قلوبهم وإذا تليت عليهم آياته زادتهم إيمانا وعلى ربهم يتوكلون