Illnesses and Death - Where do they come from?

Illnesses and Death: If you're afraid of illnesses, if you are afraid of death, then you should contemplate where they com from? 

Where do they come from? They arise from birth. So don’t be sad when someone dies, it's just nature, and his suffering in this life is over. If you want to be sad, be sad when people are born: Oh. No, they 've come again. They 're going to suffer and die again!"