I'm sure the questions that Dostoevsky, himself, wished to probe are those posed by the epilogues. Certainly, other of his novels I've read have cryptic but fascinating final pages.
Originally Posted by Cygnus X-2112
I suspect major subtlety lies in the character of Sonia ("Little mother Sofya Semyonovna") and, to a lesser extent, Svidrigaļlov. Very interesting is:
All men and all things were involved in destruction. The plague spread and moved further and further. Only a few men could be saved in the whole world. They were a pure chosen people, destined to found a new race and a new life, to renew and purify the earth, but no one had seen these men, no one had heard their words and their voices.
There is a Biblical allusion in "They had another seven years to wait." Also interesting is: "Life had stepped into the place of theory and something quite different would work itself out in his mind."