In all the material I have studied, including dream courses and my own dreams, you are all the symbols and all the people in your dreams. If you dream of dead relatives, it is often that part of you that relates to them. Our dead family members are part of our ancestry and history; they are part of our world view or belief system. There is always a message that relates to you personally. For example, if I dream about my deceased grandmother I must look closely at the age she is in the dream and determine how that relates to any current situations in my own life. I must also look closely at the situation in the dream, watch her responses to it and determine how that relates to me in my waking life.