Does he who spends a part of the night prostrating his reason to divine revelation and his body comely in worship and submission and his heart and mind in applying remembrance to Allah in standing, bewaring the Hereafter and hopeful of Allah's mercy and blessings compare with him who is heedless of it all! Ask them O Muhammad: "Do they compare, those who apply their minds' eyes and their hearts' ears to the acquisition of learning and by consequence they are well- informed and those who are ignorant of the facts! it is only those who exercise their intellect and lift to Allah their inward sight.