A youngster went to visit an old wise man. He asked the wise man,  "How can I become a person who can make myself and others happy?" The wise man looked at him and said. "My son, you're one in a thousand to have such an aspiration at this age. I give you four sentences. The first sentence is to regard you as others. Can you explain its meaning?  ”

The youngster replied, " That is to say, when I feel distressed, regard myself as others, so that I will reduce the distress naturally; when I'm ecstatic , regard myself as others, the ecstasy will become placid."  The wise man nodded slightly and went on, " The second is to regard others as you." The youngster thought for a while and said," In this way you may truly sympathize with others' misfortune, understand the others' requirements and give them proper help when they need." The wise man's eyes glowing, he continued, "The third is to regard others as others." The boy said." It means that we should fully respect each person's independence and can never infringe their core territory in any case." The wise man laughed. " Very well. The fourth is to regard you as yourself. It is too hard for you to understand, so keep it for you to taste it slowly in future."