My life, my job, my parents, my spouse, my personality, my thoughts, my body. Are these "things" really yours? You might believe that they are since they are close to you, noticed by you. However, they are all temporary, some just passing you by and some are perishable.
What we need to understand is that emotions are guidance to achieve our true desires, nothing more and nothing less. When you feel good, you are following your guidance, when you feel bad, you are not. The problem is that most people perceive emotions as unchangeable facts. And since we don't question facts we don't inquire about their purpose.