It's very humanizing how Van Helsing is admiting that he is really scared of Mina right now, then writing a memorandum to keep his possible last words where he clarifies that is not Mina's fault, but her progressing vampirism plus the enviroment.
And I like it not. And I am afraid, afraid, afraid!—I am afraid of all things—even to think but I must go on my way. The stake we play for is life and death, or more than these, and we must not flinch.
Unlike other vampiric media where the old mentors, who ironically come from Van Helsing, are characterized as one man armies against any vampires with only cold detatchment to present or "badass" frowns, the old dutch professor himself has no shame in admiting that he feels the very base fear of death.
Moreover, what makes this moment excellent is how Van Helsing admits that all of his fears cannot make him forget the duty he promised to Mina. It doesn't matter at the end, since Mina's well being through that hellish transformation comes first.
