"If you're wondering why you aren't dead yet, it's because you stepped outside of the primary timeline."
"No. You're not immortal, but causality does not like anyone playing games."
"So how am..."
"Simple! You are not meant to be here. You simply cannot interact with this part of the timeline. Any of it. You couldn't even step on a butterfly and kill it. So forget trying to be you're own granddaddy; it ain't happening. You can't eat anything meant for anyone else. You can't drink. You can't win the lottery. All paradoxes are terminal. Usually for the creator."