Socrates said, "The unexamined life is not worth living." Rephrased in metahistorical terms, "The unexamined belief is not worth holding."
Easy enough to say, perhaps, but how many of the beliefs that you hold have you really examined?
Are the beliefs you hold innate to you, based on your own experience and judgment, or acquired from others without choice or examination on your part? You have the right to believe whatever you like, but is what you believe truly right for you, or is it someone else's idea of what you ought to believe?
(metahistory.org)