“Ali ibn al-Husayn (a.s.) has said, ‘The world has begun to move backwards and the next world is moving forward. Each world has its sons. Therefore, you must be of the sons of the next world and not the sons of this world. You must be of those who have reduced their interest in worldly matters and of those seriously interested in the next life. You must know that those with reduced interest in worldly matters have taken the earth as their habitat, the soil as their bedding, water as their perfume and have cut themselves off this world in all seriousness.’ “Note that those who are interested in paradise have harnessed their worldly desires and those who are afraid of the fire have turned away from prohibited matters. Whoever reduces his interests in worldly matters, hardships become easy for him. “Note that there are the servants of Allah who are as if they, actually, see the people of paradise in paradise live forever and the people of fire in the fire in huge suffering. Instead of evil coming from them it is absolute peace, the hearts of these servants of Allah are sad, their soul chaste, and their needs are very light. They exercise patience for a few short days followed by a very long lasting comfort. At night they stand up straight with their feet side by side and tears come down their cheeks. They plead before their Lord and struggle to set their neck free (of sins). In the day they are forbearing scholars, very virtuous and pious. They are slim like an arrow without fins; it is caused by their fear (for possible suffering in the next life) during their worship. On looking to them one may think they suffer from illness. They, in fact, have no illness, or any confusion in their reasoning power, but they have plunged into a tremendously great issue; it is the issue of the fire and all that it involves.”