Robert H. Goddard Quote
It is not a simple matter to differentiate unsuccessful from successful experiments....[Most] work that is finally successful is the result of a series of unsuccessful tests in which difficulties are gradually eliminated.
The Papers of Robert H. Goddard: 1938-1945 (ed. 1970)
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![It is not a simple matter to differentiate unsuccessful from successful experiments....[Most] work that is finally successful is the result of a...](https://img.libquotes.com/pic-quotes/v2/robert-h-goddard-quote-lbv4i9u.jpg)
![It is not a simple matter to differentiate unsuccessful from successful experiments....[Most] work that is finally successful is the result of a...](https://img.libquotes.com/pic-quotes/v3/robert-h-goddard-quote-lbv4i9u.jpg)
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