[The X-Files S9] Because it's mine

CABALLERO : Why would you want to remember? You can't tell me you're happier now, because you recall your life. I saw it all. So much pain. Why would you want to struggle, so long, and hard, to get that pain back? 

DOGGETT : Because it's mine.

the X-files season 9 ep 07 'John Doe'