Older people know something that I don't. I have heard often of the man who says what he is thinking, regardless of his audience, airing his thoughts on any subject that happens to quicken his anger or passions. Sons and daughters quickly shush old men like this for fear of offense, and strangers cast sideways glances, dismissing them as senile. Still, these men know something that I don't. They know that the opinions of others are no threat to them. They know that they will go on living in spite of the anger roused in others by their beliefs; and they know that one's beliefs can as easily be shaped by others if he or she is not careful to define them oneself. These men may lack prudence, but they have wisdom. They may express indifference, but they radiate certitude. There is a balance to be had, I suppose, and a time and place for everything; but in a climate rife with sensitivity to the politically correct, it can be both comic and telling to watch one of these older...