"I have known people and kept company with groups who neither rejoiced when the things of this world came to them, nor grieved when they lost anything in this world. The life of this world was more insignificant to them than dust. One of them might live for a year or for sixty years without ever having a garment that would entirely cover him, and without ever having anything that would come between him and the ground, and without ever having any food that he could ask to be prepared for him in his own home. When night came, they would be on their feet, with their foreheads flat against the earth, tears rolling down their cheeks, secretly calling on Allah to save them on the Day of Judgement. If they did something good, they never stopped being grateful for it, and they were always asking Allah to forgive them for it. By Allah, they were not safe from wrong actions, and were saved only by their constant turning in repentance. May Allah be pleased with them and grant them His mercy..."
al-Hasan al-Basree rahimahullah