Of all kinds of credulity, the most obstinate and wonderful is that of political zealots; of men, who being numbered, they know not how or why, in any of the parties that divide a state, resign the use of their own eyes and ears, and resolve to believe nothing that does not favour those whom they profess to follow.
The bigot of philosophy is seduced by authorities which he has not always opportunities to examine, is entangled in systems by which truth and falsehood are inextricably complicated, or undertakes to talk on subjects which nature did not form him able to comprehend...
All the knowledge he can want is within his attainment, and most of the arguments which he can hear are within his capacity.
-- Samuel Johnson, ca. 1758