Have you ever wondered, 'Who am I really?' Am I a father, husband, friend, engineer, passenger, or patient? The fact is, you are a father because you have a son. He is a husband because he has a wife. You are a passenger because you are on a train. So, all your identity, everything you believe you are, all depends on something else. So, who are you? Dad, husband, or passenger?
By not understanding the answer to the question, who am I?
You continue to build your new identity, due to which you move away from your identity. All suffering in life is due to not knowing your true identity. Until you know what kind of person you are, you will believe it to be the identification name that was given to your body in this world.