If a man keeps dwelling on sense-objects, attachment to them arises; from attachment, desire flares up; from desire, anger is born; from anger, confusion follows; from confusion, weakness of memory; weak memory --- weak understanding; weak understanding --- ruin; But the man who is self-controlled, who meets the objects of the senses with neither craving nor aversion, will attain serenity at last. In serenity, all his sorrows disappear at once, forever; when his heart has become serene, his understanding is steadfast. The undisciplined have no wisdom, no one-pointed concentration; with no concentration, no peace; with no peace, where can joy be? *** Bhagava Gita [2.62-66] http://www.bhagavad-gita.org/Gita/verse-02-61.html