“All it takes is instinct.”

“And it's really very difficult to kill someone when all your inner instincts would oblige you to take off your hat first!”

“Fear has made them sloppy. The world teeters at a precipe. All scared to take a step in case they put a foot into empty air. The instinct of self-preservation. It can destroy a man's efficiency.”

“It takes a great deal of Christianity to wipe out uncivilised Eastern instincts, such as falling in love at first sight.”

“The human instinct for self-preservation is strong. I know, because mine pulls at me, too, like the needle on a compass. And everybody - I've been reading some philosophy - everybody seems to agree that the instinct and responsibility of all humans is to take care of themselves first. You have the right to self-defense. You have the right to survive, if you can.”

“To live is like to love--all reason is against it, and all healthy instinct for it”