Imam Muhammad al-Baqir (as): O Hisham, He who wants freedom from Want without the need for riches, and comfort of the heart free from jealousy, and security in his faith should implore Allah, Mighty and Exalted, in his plea for Him to perfect his intellect. One who uses his intellect will be content with that which suffices his essential needs, and one who is content with that which suffices his essential needs will be rich, whereas one who is not content with that which suffices his essential needs will never experience riches [he will always want more and will never be satisfied]. al-Kāfī