A judge can consult whatever he wants, Bible, dictionary, whatever. A jury is simply not allowed to. You cannot, even as a juror, tell of your own personal knowledge about a subject. It is highly restrictive. I understand why these restrictions are in place. Hmmm, not sure how much I agree with them, but they are probably a good idea.
Im sure you can see the folly in your own reply.
"All that is essential for the triumph of evil is that good men do nothing." -- Edmund Burke