"It's a mindset where you turn living breathing humans into moving target dummies," Six said coldly. "You have to learn to make your morals take a backseat while you're in the middle of the mission and focus only on making the target dummy stop moving.

"Your first few kills, you still justify it to yourself: 'He deserved to die', 'she left me no choice', and so on. But after a while, a list of targets is the same as a To Do list. You stop feeling sick after a kill. The real sickos even get a high off of it. But it's the same in the end: 'Target is dead. Next.'

"Once you reach that point, you can't take it back. Not any of it. You never switch off the mindset. I found the loveliest little phrase to sum it up with while here:

"Nothing is true. Everything is permitted."