Roger Bacon — "Theories are of no use unless they can be verified by experiment."
Theories are of no use unless they can be verified by experiment.
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More from Roger Bacon
"The present state of philosophy is deplorable, and needs to be reformed."
"There are four chief obstacles to grasping truth: authority, habit, popular opinion, and the concealment of ignorance."
"For the infidels possess many excellent things, and much wisdom, from which we Christians can derive profit."
"The greater part of the world is ignorant of the true wisdom, and is ruled by error and deception."
"The study of grammar, as it is commonly taught, is a waste of time."