There is a good example. A woman who desperately wishes to have a baby dreams that she is pregnant and even giving birth. She is so happy. Within the very same dream, baby dies. She is very unhappy. She wakes up. The happiness of having the baby and the pain of the death of the baby are all gone. The third experience is what Buddhist are trying to aim, not to have the baby, not not to have the baby but to go beyond that.