" crossed borders like the wind. Yet it had happened, and Khristo finally understood how it had happened. Moving across the countryside made one prey, over time, to a series of small mishaps, none of them serious in and of itself, but cumulative over time. A few hours of sleep when one could manage it, a meal now and then, the insidious chill of the early spring, the constant forcing of the mind into a state of vigilance when all one craved was numbness, when not to think about anything seemed the most exquisite luxury the world had to offer. "

― Alan Furst , Night Soldiers (Night Soldiers, #1)