I came across a good quote from John Adams, signer of the Declaration of Independence and second president of the U.S. What he says here makes me think he’d feel completely comfortable with Beliefnet.com:

“I am, therefore, of the opinion that men ought (after they have examined, with unbiased judgments, every system of religion and chosen one system, on their own authority, for themselves), to avow their opinions and defend them with boldness.”