The world runs on from one folly to another; and the man who, solely from regard to the opinion of others, and without any wish or necessity of his own, toils after gold, honour, or any other phantom, is no better than a fool.

[Alles in der Welt läuft doch auf eine Lumperei hinaus, und ein Mensch, der um anderer willen, ohne daß es seine eigene Leidenschaft, sein eigenes Bedürfnis ist, sich um Geld oder Ehre oder sonst was abarbeitet, ist immer ein Tor.]

Johann Wolfgang von Goethe (1749-1832) German poet, statesman, scientist

Die Leiden des Jungen Werthers [The Sorrows of Young Werther], Book 1, “July 20” (1774) [tr. Boylen (1854)]
    (Source)

(Source (German)). Alternate translation:

A man who works at another’s will, not for his own passion or his own need, but for money or honor, is always a fool.
[tr. 1779]