Thomas Pynchon, Gravity's Rainbow page 41

Once Roger and Jessica might have stopped. But they're both alumni of the Battle of Britain, both have been drafted into the early black mornings and the crying for mercy, the dumb inertia of cobbles and beams, the profound shortage of mercy in those days. . . . By the time one has pulled one's nth victim or part of a victim free of one's nth pile of rubble, he told her once, angry, weary, it has ceased to be that personal . . . the value of n may be different for each of us, but I'm sorry: sooner or later . . .

And past the exhaustion with it there is also this. If they have not quite seceded from war's state, at least they've found the beginnings of gentle withdrawal . . . there's never been the space or time to talk about it, and perhaps no need--but both know, clearly, it's better together, snuggled in, than back out in the paper, fires, khaki, steel of the Home Front. That, indeed, the Home Front is something of a fiction and lie, designed, not too subtly, to draw them apart, to subvert love in favor of work, abstraction, required pain, bitter death.