You do not know when the time will come. I'm sure that you have been told at one time or another that all of us, in a sense, live on death row. It is a favorite topic of many preachers.
Human beings are mortal, and death is inevitable.
Instinctively, all of us resist death with every fiber of our being. This is completely natural and to be expected. Many of us have not. Many of us try to deny its power, its inevitability, its very existence. When it does come, usually unexpectedly, we are generally unprepared.