MacReady: How you doin', old boy?Dr. Blair: I don't know who to trust.MacReady: I know what you mean, Blair. Trust's a tough thing to come by these days. Tell you what - why don't you just trust in the Lord?
Now I'll show you what I already know.
I know I'm human. And if you were all these things, then you'd just attack me right now, so some of you are still human. This thing doesn't want to show itself, it wants to hide inside an imitation. It'll fight if it has to, but it's vulnerable out in the open. If it takes us over, then it has no more enemies, nobody left to kill it. And then it's won.