Richard Feynman — "To guess what to do, you can't be a scientist unless you have a feel for the num…"
To guess what to do, you can't be a scientist unless you have a feel for the numbers.
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 very surprised that a lot of artists, when they found out I was a scientist, they would start telling me about their theories of the universe, and they were always crackpot theories."
"I don't believe in the idea of a 'genius.' I believe in the idea of a 'hard worker.'"
"The game of science is to understand the world."
"I have often thought that if there is any hell, it must be the place where there are no questions, only answers."
"I have no idea where I'm going. I have no idea where I'm going to be. So it's probably best that I don't know."
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
Scientific intuition requires numerical grounding. Understanding the approximate scale of things—how big, how fast, how many—lets a scientist make educated guesses about what matters and what doesn't. Without that quantitative feel, hypotheses become arbitrary. Numbers constrain imagination productively, separating plausible ideas from impossible ones before any experiment is run.
Relevance to Richard Feynman
Feynman was legendary for Fermi estimation—calculating the yield of Trinity from falling scraps of paper, estimating piano tuners in Chicago. His teaching at Caltech constantly demanded students develop physical intuition for magnitudes. He distrusted pure formalism without numerical grounding, believing theoretical physics untethered from real scales was speculation, not science.
The era
Post-WWII physics saw an explosion of abstract mathematical frameworks—renormalization, quantum field theory, particle accelerator data. There was genuine tension between mathematically elegant but physically disconnected theories and pragmatic, experimentally grounded work. Feynman championed the latter, insisting physicists maintain intuitive contact with real physical scales amid increasingly abstruse theoretical developments.
AI-generated insights based on extensive research and information for context. Factual errors? Email [email protected].