The term "bend sinister" means a heraldic bar or band drawn from the left side (and popularly, but incorrectly, supposed to denote bastardy). This choice of title was an attempt to suggest an outline broken by refraction, a distortion in the mirror of being, a wrong turn taken by life, a sinistral and sinister world. The title's drawback is that a solemn reader looking for "general ideas" or "human interest" (which is much the same thing) in a novel may be led to look for them in this one.
Vladimir NabokovFor I do not exist: there exist but the thousands of mirrors that reflect me. With every acquaintance I make, the population of phantoms resembling me increases. Somewhere they live, somewhere they multiply. I alone do not exist.
Vladimir NabokovTo a greater or lesser extent there goes on in every person a struggle between two forces: the longing for privacy and the urge to go places: the introversion, interest directed within oneself toward one's own inner life of vigorous thought and fancy; and extroversion, interest directed outward, toward the external world of people and tangible values.
Vladimir NabokovEven while writing his book, he had become painfully aware how little he knew his own planet while attempting to piece together another one from jagged bits filched from deranged brains.
Vladimir Nabokov