People who always think
But I think the best way to live life is that you have to concentrate on your present. Nor the memories of past and never the futuristic thinking can make you happy. People who always think about the past life and the past event can never become happy. People who always think about the future and remain busy in making plans for future can also be never become happy. I think we must live in present, enjoy the present with full life.
the time which has been passed
Past is the time which has been passed and alive in memories. We the humans all have some of the past memories in our mind. Some of the people always remember their past and the some past event. Some people give great importance to their past life and live their present remembering them. And some people always worried about the upcoming future time.