I can’t see the thief that lives inside of your head …

“To mourn a mischief that is past and gone
is the next way to draw new mischief on.
What cannot be preserved when fortune takes,
Patience her injury a mockery makes.
The robbed that smiles steals something from the thief;
He robs himself that spends a bootless grief.”

~ Duke, from Othello (I.iii.202-207).