"The intellectualist has the type of mind that can deteriorate easily into a tumbling ground for whimsies. Straight thinking is rare in our time, and common sense the most uncommon of the senses. Many psychological difficulties have their origin in the effort to live in harmony with some immature system of opinions. Everyone has opinions and to their owners these notions are vitally significant, worthy to be passed on as a priceless heritage unto their issue. To differ with a man's opinions is a grave social error, not easily forgiven. But, opinions are of importance no greater than the mental achievements of the person who has them; and they are most abundant where the ability is the slightest. Even your own opinions on any matter are not to be taken by yourself too seriously unless you know you are thoroughly informed on the subject."
-Manly P. Hall