O youth.......be assured that knowledge alone does not strengthen the hand......Though a man read a hundred thousand scientific questions and understood them or learned them, but did not work with them---They do not benefit him except by working.....Knowledge is the tree, and working is its fruit; and though you studied a hundred years and assembled a thousand books, you would not be prepared for the mercy of Allah the Exalted except by working.
Al-GhazaliLove for God is the farthest reach of all stations, the sun of the highest degrees, and there is no station after that of love, except its fruit and its consequences.
Al-GhazaliWork for your terrestrial life in proportion to your location in it, and work for your afterlife in proportion to your eternity in it.
Al-Ghazali