Arrogance, Humility, and the Law of Proportionate Belief

Arnold Kling has a nice post over at Tech Central Station on "The Law of Proportionate Belief" as a guide to navigating away from arrogance:

"The Law of Proportionate Belief states that one should believe in a certain proposition or policy prescription in proportion to the arguments for that position.  The Law is a core ideological principle with me.  I have problems with anyone -- liberal, conservative, libertarian, or otherwise -- who violates the Law...  Another term for violating the Law of Proportionate Belief is 'arrogance.'  Conversely, following the Law can be viewed as 'humility.' "

Check it out and post your thoughts in the comment section -- do you agree with Kling's point of view?