The first principle is that you must not fool yourself, and you are the easiest person to fool.
In plain words
The easiest person to fool is you, so check yourself first.
Where these words come from
- 93% sureThese words were traced back to where they first appeared. That source is listed below.
- "Cargo Cult Science," Caltech commencement address (1974); also in Surely You're Joking, Mr. Feynman!, p. 343
