Learning and personal development
What it means
Feynman tested his own understanding by whether he could build it himself. If you cannot create something, you do not yet fully understand it.
About the author
Richard Feynman — American theoretical physicist (1918–1988).
Source and verification
- Source
- Written on his blackboard at Caltech at the time of his death, February 1988 (Caltech Archives)
- Reference
- Richard Feynman on Wikiquote
- Checked
- Wording and source taken from the sourced section of the author’s Wikiquote page, which cites the work given here (accessed 2026-10-11).
- Copyright
- Short quotation from a work that is still in copyright, reproduced briefly for commentary with full attribution. Rights remain with the author or their estate.
The explanation above is ToDoMatriX’s own reading of the quote, not the author’s words.