Sarcasm?
He clearly thinks, as did our founders, that there are objective truths about the nature of man. For example, "Power Corrupts and absolute power corrupts absolutely" would be considered such an objective truth.
"Even when a person appears to act unselfishly, he has a selfish reason for acting unselfishly" might be another objective truth.
That leads to whether the leaders are different from the followers. The leaders probably fall into several camps. In one camp are the cynics... Bill Clinton, James Carville. They reach the pinnacle of selfish unselfishness.
Another type are the true believers. They often have enough charisma and sincerity that they can have quite a following. Al Gore and John Kerry will deny that they are acting selfishly in promoting their current crusade... and it is a crusade in the true religious sense of "my perfect religion will wipe out your flawed religion".
I was merely commenting that he didn't try to make his opinions sound like science. I usually see this from the left - such as the studies showing Republicans are more "authoritarian", etc.