The nature of the mind is such that it becomes that which it intensely thinks of. Thus, if we think of the vices and defects of another man, our mind will be charged with these vices and defects at least for the time being. This practice enables us to grow in concentration, spirituality and divine life. Negative and destructive emotions like anger, generate poison in the blood, in the brain, in the liver, in the whole system. They produce fever and depression.
Hatred causes nervous weakness, uneasiness, restlessness, cough, fever, loss of blood, indigestion.
Jealousy will create an inferiority complex, will distort your thought, and damage your health. Jealousy is at the root of the nervous break-down of millions of people all over the world. Very few people realize that evil qualities like hatred, jealousy, anger and impatience are harmful to themselves rather than to those towards whom they are directed. A fit of anger that lasts ten minutes takes away more energy than would the working at the plough for two days without food. Worry, anxiety and such other emotions, bring on grey hairs scores of years earlier than they are due.