#he is preparing for a worst case scenario the rest of the crew can't begin to imagine

[see-arcane]

God, this entry is really a master class in how to show the fallibility of a direct POV and how to tell the character in question is ludicrously oblivious.

The lethargy grows upon her, and though she seems strong and well, and is getting back some of her colour, Van Helsing and I are not satisfied. We talk of her often; we have not, however, said a word to the others. It would break poor Harker's heart—certainly his nerve—if he knew that we had even a suspicion on the subject. 

Jack. This man lived for two months with four active vampires. He knows. And he knows you know. He did not just magically un-learn all the facts and leave you and your idol alone on top of ‘Me, An Intellectual’ Mountain. 

Van Helsing examines, he tells me, her teeth very carefully, whilst she is in the hypnotic condition, for he says that so long as they do not begin to sharpen there is no active danger of a change in her. If this change should come, it would be necessary to take steps!... We both know what those steps would have to be, though we do not mention our thoughts to each other. 

Jonathan knows those steps too, Jack. He read about Lucy, Jack. He can tell when Mina is being Different, Jack. He knows what you and Abe are thinking of, Jack. 

We should neither of us shrink from the task—awful though it be to contemplate. "Euthanasia" is an excellent and a comforting word! I am grateful to whoever invented it.

Jonathan ‘Never Puts Down His Kukri Knife’ Harker is so glad you agree, Jack! Raise one hand against Mina and you’ll see just how into it he is.

It’s just...wow. Whether Stoker intended it or not, he perfectly encapsulated the ‘Would Never Make It to the End of a Horror Movie’ characterization.