Wer aufhört, BESSER sein zu wollen, hat aufgehört GUT zu sein
English translation: Anyone who stops wanting to be better, has stopped being good.
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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
German term or phrase:
Wer aufhört, BESSER sein zu wollen, hat aufgehört GUT zu sein.
English translation:
Anyone who stops wanting to be better, has stopped being good.
German to English translations [PRO] Bus/Financial - Philosophy / Motivational quotation
German term or phrase:Wer aufhört, BESSER sein zu wollen, hat aufgehört GUT zu sein
"Wer aufhört, BESSER sein zu wollen, hat aufgehört GUT zu sein."
This is reputed to have been said by Robert Bosch, German inventor & industrialist.
The quotation appears on the website of a large firm of engineers, and it part of their corporate philosophy (success, excellence, etc.)
I should be grateful for any help in improving my initial attempt:
"Whoever stops wanting to be BETTER, has stopped being GOOD."
I have enriched my knowledge of Robert Bosch (!) but could not find anything comparable on the web.
Explanation: “Anyone who stops wanting to be better has stopped being
good.“ In keeping with this quotation from Robert Bosch,
the Economic Development Department in Stuttgart also works
successfully for the most varied of companies.
Nesrin, you are so much better at googling than I. It seems Cromwell's "stops being better" became in German "stops wanting to be better", so technically, it could be argued, it is no longer something Cromwell said, but something Robert Bosch said. I think our firm of Engineers would rather have Robert Bosch than Cromwell on their website. But, if the quotation has been misattributed, perhaps I should disappoint the client, and let them know? Or, I could add something like "as Robert Bosch was fond of saying" after the quotation, which skirts around issue of who actually said it first. Thank you Kim for excising the "whosoever stoppeth" feel to my rendition. Thank you Andrew for making me laugh!
The opening sounds a bit too reminiscent of the King James Bible. How about "Anyone who..." or "Whenever we..."
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Answers
7 mins confidence: peer agreement (net): +3
Wer aufhört, BESSER sein zu wollen, hat...
Anyone who stops wanting to be better,
Explanation: “Anyone who stops wanting to be better has stopped being
good.“ In keeping with this quotation from Robert Bosch,
the Economic Development Department in Stuttgart also works
successfully for the most varied of companies.
The translation workplace 
peer agreement (net): +3
