When anyone of us does anything, he or she usually has a purpose for doing it. Whether the action succeeds in achieving the purpose or not is another matter. But sometimes the action not only fails to achieve the purpose but be the means of actively defeating and destroying it! I say this having in mind many doctors who work so hard in their clinics in pursuit of money which supposedly will bring them happiness. If they are enjoying their intensive work, that is fine. But many of them are not. They spend most of their lives overworked, tired, tense and miserable. They seek happiness by being miserable!! It is an outstanding example of actions that defeat the purpose.