  Thought about "Yesterday". I'm kind of a person that thinks about past a lot. Many people might say that do not look back but just keep going. However, for me looking back my life is the best way to keep going my healthy life. Today cannot be exist without yesterday. But we seem to forget about yesterday often times. Yesterday literarly means the day before, but what I mean here is not just like that. We always keep in mind what have we done, what have our ancester done. Is it any good or bad? If it is good, then we have to think about how to keep it continually. If it is bad, we have to find out what is the best way to fix the problem. Think about yesterday. What have you done? ? 
