You should bear in mind that grief and shock are something which befall everyone at one time or another. This makes him worried and disturbed and deprives him of his peace and rest. The reason for that is that mentally he has not surrendered himself to Allah Taala’s decision and destiny. How can such a man have peace and rest? There is however, a man who realises that he has done everything which was within his power and beyond this he is helpless. He has therefore, to accept whatever comes to him from Allah because His decision is final and none can change the divine/Decision. A man so resigned to his destiny may have to face grief and shocks but he can never face worries and anxieties.