Nahj al-Balagha (Peak of Eloquence)

349. Amīr al-mu’minīn, peace be upon him, said: He who sees his own shortcomings abstains from looking into other’s shortcomings. He who feels happy with the livelihood with which Allāh provides him does not grieve over what he misses. He who draws out the sword of revolt gets killed with it. He who strives without means perishes. He who enters the depths gets drowned. He who visits places of ill-repute receives blame. He who speaks more commits more errors. He who commits more errors becomes shameless. He who is shameless will have less fear of Allāh. He whose fear of Allāh is less, his heart dies. He whose heart dies enters the Fire. He who observes the shortcomings of others and disapproves of them and then accepts them for himself is definitely a fool. Contentment is a capital that does not dwindle. He who remembers death much is satisfied with small favours in this world. He who knows that his speech is also a part of his action speaks less except where he has some purpose.