《COURAGE之言》The precious thing is fragile.

The precious thing is fragile. –Translating form HUNTERXHUNTER

The precious thing may not be expensive thing.

The stone everywhere, it might become precious in some reasons, then, 

the stone is not everywhere, and it becomes only one.

One thing becomes only one, even if it is a stone by road side, it might easy to lost, 

and it would be protected perfectly.

Thus, because of the only one, it is precious. Because it is precious, it is fragile.