What is sad but true about?

The sad but true thing is that life is finite. We are all born with a limited amount of time, and there is nothing we can do to stop the clock. As we get older, we become increasingly aware of our own mortality, and this can be a difficult reality to accept. However, it is important to remember that life is also precious and that we should make the most of every moment. We should not take our time for granted, and we should not let fear of death prevent us from living our lives to the fullest.