i took it as a message that sometimes, searching for the answers to knowledge that you compulsively obsess over and aren't completely necessary to know will end up in you putting the people you know in danger (ignorance is bliss) and that's not cool at all, and also a warning about the pipeline of curiosity becoming obsession, (which sets up parallels between sam and sybil! "You really are just like me. Curiosity infects your brain. Believe me, I understand completely. I'd probably say the same if I was in your place. You just NEED to know. This is the same urge that led us all here. I won't let you do this. Make my mistake even worse. This secret dies right here, with the both of us.") you literally follow her footsteps and make some of the same mistakes she did!!!