That material happiness of which we hear, such as promotion to heavenly planets for celestial enjoyment, is just like that material happiness we have already experienced. Both are polluted by jealousy, envy, decay and death. Therefore, just as an attempt to raise crops becomes fruitless if there are many problems like crop disease, insect plague or drought, similarly, the attempt to attain material happiness, either on earth or on the heavenly planets, is always fruitless because of innumerable obstacles.