I am gonna talk about the ultimate outcome of the Holiest Love plotline for a bit. It's spoilers so it's under the cut.
I was thinking earlier, and I may have said as much at some point, that after the incredible weight of Jonathan's resolution to join Mina in vampirism, Stoker kind of flinched in never calling upon him to actually do it
But now I think that might be the whole point
Both Harkers are flirting with the cardinal sin of Despair (which is a type of Pride in that it involves putting yourself above God) - but van Helsing is calling them out for it. When Mina is burned by the Host and declares that God Himself has rejected her, he tells her instead:
For so surely as we live, that scar shall pass away when God sees right to lift the burden that is hard upon us.
And a lot of other van Helsing words because that's just how he is, but their general thrust is: don't assume the worst and trust that God knows what He is doing. And later, when Jonathan starts talking about selling his soul, he has a similar admonishment:
God does not purchase souls in this wise; and the Devil, though he may purchase, does not keep faith. But God is merciful and just, and knows your pain and your devotion to that dear Madam Mina
The message is the same: don't jump into things, don't give in to Despair, and trust that God knows what He's doing.
The Harkers are ready to sacrifice everything for each other (and that is very sexy of them) but God is never going to require that of them (and more importantly neither is Stoker). They are caught up in contingency plans for when they fail, but they're not going to fail - they're forgetting to account for the possibility that they might win. It's a story of Good vs Evil, and Good is going to triumph through Faith, Hope, and Love. This is also why Lucy is able to recieve four successful blood transfusion when each one has a 50% chance of killing her - because Stoker is not interested in writing the kind of story where such a supreme act of love and devotion is punished.
The whole point is that the Power of Love is greater than whatever powers come out of the darkness, because it is backed by God, who is faithful. The Harkers are never going to be called upon to damn themselves for love of each other because that's not how Love works and that's not how God works.
(And that's why that "Dracula faked his own death with Quincey's help, and the meaning of the epilogue is that the cycle of Evil continues" thing is such a terrible take - it's directly counter to the whole point of the novel which is Good Triumphs in the End)
Jonathan is railing at the heavens saying that if Mina is barred from Heaven he will face God and walk backwards into Hell, and the textual response is: exactly. God would never do that. Chill.
