“Once As-Sadiq (a.s.) saw a man who was seriously upset over the death of his son. The Imam (a.s.) told him, ‘Are you so upset about such a minor calamity and have you forgotten about the major calamity? If you had prepared yourself earlier for the loss of your son you would not have become so upset now. This lack of preparedness for the loss of your son is worse than his actual loss.’”