نهج البلاغه Amir al-Mu'minin, peace be upon him, said : There are two kinds of workers in the world. One is a person who works in this world for this world and his work of this world keeps him unmindful of the next world. He is afraid of destitutionfor those he will leave behind but feels himself safe about it. So, he spends his life after the food of others. The other is one who works in this world for what is to come hereafter, and he secures his share of this world without effort, Thus, he gets both the benefits together and become the owner of both the houses together. In this way, he is prestigious before Allah. If asks Allah anything He does not deny him.