“What I learned

The well-documented difference
Between alone and lonely
The comfort of knowing”

As quoted in Fitzgerald to His Friends: Selected Letters of Edward FitzGerald (1979) edited by Alethea Hayter, p. 178.

"The Making of a Scientist," p. 14 <!-- Feynman used variants of this bird story repeatedly: (1) "What is Science?", presented at the fifteenth annual meeting of the National Science Teachers Association, in New York City (1966) published in The Physics Teacher, volume 7, issue 6 (1969), p. 313-320. (2) Interview for the BBC TV Horizon program "The Pleasure of Finding Things Out" (1981), published in Christopher Sykes, No Ordinary Genius: The Illustrated Richard Feynman (1994), p. 27. -->
What Do You Care What Other People Think? (1988)
Context: You can know the name of that bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird. You'll only know about humans in different places, and what they call the bird. … I learned very early the difference between knowing the name of something and knowing something.

Source: What Matters Most is How Well You Walk Through the Fire

Source: How to Kill a Rock Star

Letter to W G Whittaker, 1914, quoted in Paul Holmes Holst p. 62.

Source: Omensetter's Luck

Source: The City of Ember

Source: Sloppy Firsts

Source: Lone Wolf