Herbert N. Casson in: Sheet Metal Workers' International Association (1928) Sheet Metal Workers Journal p. 22
1920s-1940s
“If man is to survive, he will have learned to take a delight in the essential differences between men and between cultures. He will learn that differences in ideas and attitudes are a delight, part of life's exciting variety, not something to fear.”
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Gene Roddenberry 27
American television screenwriter and producer 1921–1991Related quotes

“I learned very early the difference between knowing the name of something and knowing something.”
"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.

“Delight is the secret. Learn of pure delight and thou shalt learn of God.”
Thoughts and Glimpses (1916-17)
"The Best Idea We Ever Had" Marking the Sparrow's Fall: The Making of the American West, page 137

“So this is the difference between telling a story and being in one, he thought numbly, the fear.”
Source: The Name of the Wind (2007), Chapter 6, “The Price of Remembering” (p. 49)

As quoted in Simpson's Contemporary Quotations (1988) by James Beasley Simpson; also quoted in Running on Empty: Meditations for Indispensable Women (1992) by Ellen Sue Stern, p. 235
Paraphrased variants: The most important thing I have learned over the years is the difference between taking one's work seriously and taking one's self seriously. The first is imperative, and the second disastrous.
Take your work seriously, but never yourself.