And so I learned that familiar paths traced in the dusk of summer evenings may lead as well to prison as to innocent untroubled sleep.
Albert CamusWhat's natural is the microbe. All the rest-heath, integrity, purity (if you like)-is a product of the human will, of a vigilance that must never falter. The good man, the man who infects hardly anyone, is the man who has the fewest lapses of attention.
Albert Camus