"It struck him that in moments of crisis one is never fighting against an external enemy, but always against one’s own body... On the battlefield, in the torture chamber, on a sinking ship, the issues that you are fighting for are always forgotten, because the body swells up until it fills the universe, and even when you are not paralysed by fright or screaming with pain, life is a moment-to-moment struggle against hunger or cold or sleeplessness, against a sour stomach or an aching tooth."

Source: George Orwell, Ian Angus, Sheila Davison “The Complete Works of George Orwell: Nineteen eighty-four”