I think maximum lifespan is about a hundred years. Compared to human history, a hundred years is quite short. So if we utilize that short period to create more problems on this planet, our life would be meaningless. If we could live for a million years, then maybe it would be worthwhile to create some problems. But our life is short. Now you see, we are guests here on this planet, visitors who have come for a short time, so we need to use our days wisely, to make our world a little better for everyone.”
