Well resisting temptation is hard, as the 19th century English economist Nassau William Senior said, "" To abstain from the enjoyment which is in our power, or to seek distant rather than immediate results, are among the most painful exertions of the human will. "" If you set goals for yourself and you're like a lot of other people, you probably realize it's not that your goals are physically impossible that's keeping you from achieving them, it's that you lack the self-discipline to stick to them.