Roger Bacon, a 13th century Franciscan philosopher-theologian, began his Opus Majus, “Major Work,” with a discussion on the four obstacles he believed which diverted people from the truth: “Now there are four chief obstacles in grasping truth, which hinder every man, however learned, and scarcely allow any one to win a clear title of learning, namely, submission to faulty and unworthy authority, influence of custom, popular prejudice, and concealment of our own ignorance accompanied by an ostentatious display of our... Read more















