I don't believe in guilt, I believe in living on impulse as long as you never intentionally hurt another person.
The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.
The difference between stupid and intelligent people—and this is true whether or not they are well-educated—is that intelligent people can handle subtlety.