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 study of alchemy is not only useful, but necessary, for the perfection of all other sciences."
Controversial"The common way of teaching is a hindrance to true knowledge."
Controversial"Theories are of no use if they cannot be tested by experiment."
Strange & Unusual"For in the books of the Gentiles, and of the Saracens, and of all unbelievers, there is much that is useful for the understanding of the Scriptures, and for the government of the world, and for the co…"
Controversial"The greater part of the world is ignorant of the true wisdom, and is ruled by error and deception."
Controversial