Roger Bacon:

It is necessary to know the causes of things, and not only their effects, if we wish to have perfect knowledge.

— Roger Bacon Medieval

Early advocate of scientific method

Opus Majus, Part II, Chapter I

c. 1267

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Cross Reference

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"The secrets of nature are not revealed to those who rely on books alone."

"The common way of teaching is rather for ostentation than for instruction."

"Without experiment, nothing can be sufficiently known."

"The Latins have corrupted the texts of the Scriptures, and of the philosophers."

"The study of magic, though often abused, contains many useful truths."