In order to become happy, we cannot become so with our strength alone. Since we must have the cooperation of others, it goes without saying that harmony with others is essential. Since we cannot receive the cooperation of others by selfish behavior, it is only natural that we must respect others and observe proper etiquette.
Isn’t the most important thing in human relations the mental understanding of others? When meeting a person we communicate our mind by saying words of greeting another with a vibrant, cheerful and courteous manner, our mind becomes energized and bright. In particular, since the “Good Morning” of the morning is a greeting at the start of the day, shouldn’t we value it because it also brings forth the energy of the day?