“The scholar does not consider gold and jade to be precious treasures, but loyalty and good faith.”
Source: The Ethics of Confucius
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Confucius 269
Chinese teacher, editor, politician, and philosopher -551–-479 BCRelated quotes
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 236.

As quoted by Karl Fink, Geschichte der Elementar-Mathematik (1890) translated as A Brief History of Mathematics https://books.google.com/books?id=3hkPAAAAIAAJ (1900, 1903) by Wooster Woodruff Beman, David Eugene Smith. Also see Carl Benjamin Boyer, A History of Mathematics (1968).
Mysterium Cosmographicum (1596)

“Not all treasure is silver and gold, mate”

"On Revolutionary Morality" (1958)
1950's, On Revolutionary Morality (1958)

(zh-TW) 報君黃金臺上意,提攜玉龍為君死。
Closing lines
"Ballad of the Grand Warden of Goose Gate" (《雁門太守行》)

“He that is strucken blind can not forget the precious treasure of his eyesight lost.”
Source: Romeo and Juliet