Roger Bacon
The Franciscan who insisted that experiment, not authority, settles a question, and sketched flying machines four centuries early.
Roger Bacon taught at Oxford and Paris and grew impatient with a learning built on citing old books. Knowledge, he argued, comes from two sources: reasoning, which can only propose, and experience, which alone confirms. He pressed for the study of optics, mathematics, languages, and alchemy, performed experiments with lenses and light, and imagined self-propelled carriages, diving suits, and machines for flight. His enthusiasm outran his age and earned him suspicion and, by tradition, imprisonment within his own order. But his demand that nature be questioned directly makes him a forerunner of the scientific method.
Places
Ideas
Words
“Reasoning draws a conclusion, but does not make it certain, unless the mind discovers it by the path of experience.”
Works
Life & Moments
Born in England
Born in England, he studied and taught at Oxford and Paris, growing impatient with learning built on authority.
Experiment Over Authority
Argued that knowledge comes from reasoning, which proposes, and experience, which alone confirms. Nature must be questioned directly.
The Opus Majus
Sent the pope a vast proposal urging experiment, mathematics, optics, and languages as the true roads to knowledge.
Suspicion and Imprisonment
His enthusiasm for alchemy, optics, and forbidden learning earned suspicion. By tradition he was imprisoned within his own Franciscan order.
Influence
Influenced by
- Ibn al-Haytham
Roger Bacon studied Ibn al-Haytham's Book of Optics directly in its Latin translation, absorbing both its account of vision and its insistence on experimental verification, a debt Bacon's own writing on optics and scientific method openly acknowledges.
- Aristotle
Roger Bacon lectured on the newly available Aristotle at Paris before deciding that commentary was not enough and that mathematics and experiment would have to do work no text could.
- Al-Kindi
Bacon drew on al-Kindi's account of how power radiates in straight lines from every point of a body, using it alongside Ibn al-Haytham's optics to build his own theory of multiplication of species.
