World and its people
Nahj al-Balāgha|Volume 1|Book 1|Chapter 191
فَأَهْطِعُوا بِأَسْمَاعِكُمْ إِلَيْهَا، وأكظّوا بِجِدِّكُمْ عَلَيْهَا، وَاعْتَاضُوهَا مِنْ كُلِّ سَلَف خَلَفاً، وَمِنْ كُلِّ مُخَالِف مُوَافِقاً. أَيْقِظُوا بِهَا نَوْمَكُمْ، واقْطَعُوا بِهَا يَوْمَكُمْ، وَأَشْعِرُوهَا قُلُوبَكُمْ، وَارْحَضُوا بِهَا ذُنُوبَكُمْ، وَدَاوُوا بِهَا الاْسْقَامَ، وَبَادِرُوا بِهَا الْحِمَامَ، وَاعْتَبِرُوا بِمَنْ أَضَاعَهَا، وَلاَ يَعْتَبِرَنَّ بِكُمْ مَنْ أَطَاعَهَا. أَلاَ وصُونُوهَا وَتَصَوَّنُوا بِهَا،
Therefore, hasten with your ears towards it and intensify your efforts for it. Make it a substitute for all your past (shortcomings) to take their place as a successor, and make it your supporter against every opponent. Turn your sleep into wakefulness by its help, and pass your days with it. Make it the equipment of your hearts, wash your sins with it, treat your ailments with it and hasten towards your death with it. Take a lesson from him who neglects it, so that others who follow it should not take a lesson from you (i.e., from your neglecting it). Beware, therefore; you should take care of it and should take care of yourselves through it.