There are four chief obstacles to grasping truth: frail authority, custom, the opinion of the unlearned crowd, and the concealment of ignorance by ostentation.
Early advocate of scientific method
From 'Opus Majus', attacking medieval education
1267
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"The whole world is full of ignorance, and men are content to live in darkness."
Controversial"The world is full of errors, and men are in darkness, and they do not know it."
Controversial"The common way of studying is rather for the sake of reputation than for the sake of knowledge."
Controversial"The present generation is so corrupt that it despises the truth, and loves falsehood."
Controversial"Without the knowledge of Greek, it is impossible to understand the Scriptures perfectly."
Controversial