“When I speak of the sectarian, I mean the man who is so far gone in a persuasion of the truth of a system, as to be totally regardless of any evidence that may be produced to prove it false.”— Samuel Horsley
“The belief that there is only one truth, and that oneself is in possession of it, is the root of all evil in the world.”— Max Born
“Stubborn and ardent clinging to one's opinion is the best proof of stupidity.”— Michel de Montaigne