Have you ever felt sad, very sad over something that you don't even know about? You even struggle with yourself, think as hard as you can, but you don't know what do you think? Then you get angry, then cry loudly until the tiredness is present. Your body sags limp. Somehow tired of what? Is the human brain really designed like that? Yeah, it is true that we are human beings who have the ability to think so that we can produce something very powerful for civilization. That's the concept of thinking on a large scale. Thinking on a small scale arguably far from civilization is also allowed. The important thing is to think. But heii instead of creating something big starting from a small step first? When do you think? If I may answer when your curiosity about an object appears. Next comes the branded feeling of causality in mind. Why? How? then you look for the answer until your curiosity is answered and you are satisfied. But, what about the situation earlier? What ha...