Roger Bacon — "There are four chief obstacles to grasping truth: authority, habit, popular opin…"
There are four chief obstacles to grasping truth: authority, habit, popular opinion, and the concealment of ignorance.
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More from Roger Bacon
"For without experiment nothing can be sufficiently known. Therefore, he who wishes to be certain of the truths of things must have recourse to experiment."
"There are four chief obstacles to grasping truth: frail authority, custom, the opinion of the unlearned crowd, and the concealment of ignorance by ostentation."
"The greatest errors in the world arise from the neglect of experiment."
"The philosophers of the ancients, and especially the Arabs, have excelled us in many things."
"It is a great shame that Christians neglect the study of languages, which is so necessary for the understanding of the divine law."
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