Maybe In This Riddle I'll Solve

Born with it, it's implanted,
It's neither gained nor lost,
only partially revived and casted,
Or permanently live to last.

It can use or be used,
If anything, it's impressively illusive,
The latter lasts unpossessed,
but former filters in destructive.

It's invincible but very visible,
Enemy seen is better--not a friend within,
By making it despicable---
You'll see not just the pain.