Quote of the day by Richard Feynman: “The first principle is that you must not fool yourself and…”

Richard Feynman's quote “The first principle is that you must not fool yourself and you are the easiest person to fool” comes from his 1974 commencement address at the California Institute of Technology.

The quote highlights the human tendency to accept ideas that fit existing beliefs while overlooking evidence that challenges them.

Feynman argued that honesty with oneself is the foundation of genuine inquiry, and that evidence should come before belief.

The article states the quote is relevant today due to social media, artificial intelligence, and continuous influx of information.