"Since no amount of sense gratification is ever enough to satisfy us, we always feel we need “more.” From the poorest person to the richest person, from the slum-dweller to the person who lives in a mansion, everyone wants more sense gratification and thus more material wealth. If you are poor, you feel you need a color TV to be happy; if you’re rich, you feel you need a new yacht. No amount of material wealth is ever enough."