For example, when we feel strong attachment to a person, his or her every move can make us either happy or sad. During this time, the chances of getting hurt far exceeds that of gaining happiness because once there is attachment, expectation will ensue. If the other party cannot do as wished, it simply adds more unhappy moments to one’s life. This will continue until the relationship is broken and the attachment gone. Conversely, the less we care about certain things, the more likely they can give us a sense of happiness. This is life’s unbreakable natural law.
~Depicted from THE HANBOOK'S FOR LIFE JOURNEY - On The Three Poisons-How to Refute Ignorance