Fearing death is natural. If we didn't fear death, we wouldn't be here now. Fear of death is why we eat, take care of ourselves, ... etc. We cannot avoid death. We can delay it as much as possible, but we cannot avoid it. But if you think about it, after you die, you will be the same as before you were born. You will feel nothing. But still getting old and/or sick is frightening, at least to me.