In the human world, even if we knew it well or were familiar with it before, it is the natural law that a river flows into the sea after a certain period of time. That means it changes. In this case, there is no need to feel unfamiliar or even antipathetic. This is because it is a natural phenomenon and our human lives that are constantly changing toward tomorrow. Absolutely, as someone said, humanity will endure forever and will not perish in any case. Isn’t this proven by the 4.5 billion years of Earth’s history so far?