The doctor smirked, but he didn’t really seem amused. "We can’t modify your personality, Bob. It’s an emergent property. Attempts to do so have resulted in, ah, non-viable subjects. So it’s all or nothing. But we can control the endocrine simulation routines. Panic depends on a feedback loop involving adrenaline. We simply limit that. You can’t panic or get angry or frightened, you can only be deeply concerned, so to speak."