Knowing is not understanding. There is a great difference between knowing and understanding: you can know a lot about something and not really understand it.
“I look at my books the way parents look at their children. The fact that one becomes more successful than the others doesn't make me love the less successful one any less.”
“I want you to know that, despite what you might read at times in the newspapers or see on the television news, we have actually been getting a lot of things done the last several months, the U.S.-Canada relationship.”