Everything in that paragraph could be said of today's politicians, couldn't it? And of many media personalities. Or, as a book I read as an undergraduate for a philosophy class put it: Ideas Have Consequences. C.S. Lewis also touches on it in That Hideous Strength (he has a way of saying stuff in fiction that many can't express in essays).
One of my professors in seminary used to say that the ramifications of your ideas will be seen in your students. And he was correct, which can be a scary thought.