Richard Feynman — "When we know why, we know what to do."
When we know why, we know what to do.
Get This Quote & Author's Image Illustrated On:
Click any product to generate a realistic preview. Up to 3 at a time.
* Initial load can take up to 90 seconds — revising the preview in another color is nearly instant.
Kitchen
Apparel
Other
More from Richard Feynman
"I was also a little bit of a clown."
"Physics is to math what sex is to masturbation."
"I would rather have a world with five billion people that are happy and healthy and well-fed and full of wonderful things than a world with twenty billion people who are starving and miserable."
"I was very surprised when I got the Nobel Prize. I didn't think I deserved it."
"I don't want to be a part of the establishment. I want to be an outsider."
About Richard Feynman (1918-1988)
American theoretical physicist who shared the 1965 Nobel for QED, developed Feynman diagrams, and wrote the Feynman Lectures on Physics. Closely associated with Julian Schwinger (co-Nobelist for QED) and Murray Gell-Mann (Caltech rival and Eightfold-Way physicist). For an intellectual contrast, see Deepak Chopra, physician and quantum-mysticism author — Feynman's Caltech 'cargo cult science' commencement address is the precise template for what he saw as misuse of physics terminology — Chopra-style appropriation of quantum vocabulary for metaphysical claims is the canonical example of what Feynman called 'fooling yourself'.
Verification
Unverifiable
Found in 1 providers: grok
1 source checked
Understanding this quote
What it means
Understanding the underlying reason behind something gives you the power to act correctly in any situation. Memorizing facts or procedures without grasping their foundation leaves you helpless when circumstances change. True knowledge isn't a list of answers — it's comprehension deep enough that the right action becomes obvious. You don't need to be told what to do if you genuinely understand why things work the way they do.
Relevance to Richard Feynman
Feynman was legendary for demanding first-principles understanding over rote learning. He famously distinguished knowing the name of something from knowing something. His Feynman Technique — explain it simply or you don't understand it — embodied this. His QED work required dismantling existing frameworks and rebuilding from fundamental physical reasons, not inherited formulas. Teaching at Caltech, he constantly pushed students past memorization toward genuine comprehension.
The era
Post-WWII physics education was expanding rapidly, with universities mass-producing scientists for the Cold War and space race. Rote technical training dominated, churning out engineers who could calculate but not innovate. Feynman, shaped by Los Alamos and Caltech, pushed back against this factory model. The Sputnik-era pressure to produce scientific manpower made his philosophy — understand deeply or you're useless in a crisis — especially urgent and countercultural.
AI-generated insights based on extensive research and information for context. Factual errors? Email [email protected].