Roger Bacon — "The knowledge of languages is the key to all knowledge."
The knowledge of languages is the key to all knowledge.
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More from Roger Bacon
"The strongest arguments prove nothing so long as the conclusions are not verified by experience."
"The study of music, as it is commonly taught, is of little utility."
"The greatest impediment to learning is the fear of error."
"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."