When speaking, working or walking with someone, one can easily partake one's companion's disagreeable impulse, because as a rule a person thinks there is justification for giving it back, a word for a word, a frown for a frown. A person feels satisfied in boasting, "He said two words to me, but I have given him back the same in four words." He feels very glad for the moment, thinking, "I have given back what I had received." But he does not know that if he had not given it back, the same that the other person had thrown upon him would have returned to that person a thousandfold.