Why is it so important to doubt, question everything and not know?! Check out Socrates’ article on SingularityWeblog.com to find out.
Not knowing, just like other cases of being uncomfortable, is a great incentive for personal growth. Progress always comes at the point of resistance. Getting uncomfortable and willing to be uncertain, to not know, to ask questions, to err and to fail, is the best and only way to learn, grow, progress and move forward.