Fear...

Fear of unknown is a great threat to everybody....

The biggest unknown thing in the world is death...

In normal life we deal with many unknown and uncertainty events and situations...

The origin of the fear is in the survival of self in unknown...

We need to deal with such uncertainty with our known / intuitive skills and knowledge...

There is no Death fear in realized "ME" in Origin of unknown...

So, if we know self, then we will not have fear...