According to the scriptwriter of the KBS drama, Fugitive Lee Du-Yong, there are eight pains in life.
"They are the basic suffering we all go through. Besides birth, aging, sickness and death there are four additional pains to life. First is the pain of hating someone else. Next is the pain of not being able to get or do what you want. Then, the pain of parting with loved ones; not being able to meet your beloved. Finally the pain resulting from conflict between your thoughts, heart and behaviour. This pain results from the imbalance of your soul."