In Usul al-Kafi...

In Usul al-Kafi, in the chapter, "The Imams are the Light of Allah", it is narrated from Abu Khalid al-Kabuli that he said: "I asked al-Imam Muhammad al-Baqir (a.s.) about this ayah: فَآمِنُوا بِاللَّهِ وَرَسُولِهِ وَالنُّورِ الَّذِي أَنْزَلْنَا “Therefore believe in Allah and His Messenger and the Light which We have revealed;” (64:8) The Imam then expounded on the meaning of this ayah and said: `By Allah, O Abu Khalid, the Light of the Imam in the hearts of the people of Iman (who are under the influence of his sovereignty) is brighter than the light of the sun during the day.' " The meaning is that it is a great mistake to restrict the purpose, the intention, the inward and outward aspects of the precepts of the din only to the results that ensue according to the perspective of this life; and to interpret nearness to Allah, which is the direct result of the true practice of these actions, as a derived or figurative matter of the same kind of nearness to the "Lords of wealth and power" in this world, without there being an active design in the spiritual, real life of man, and without it raising him, in reality, up the ladder of existence.