For a succeeding dislike spoils the best of actions, and repentance makes that which was never so well done, become base and faulty; whereas the choice that is founded upon knowledge and wise reasoning, does not change by disappointment, or suffer us to repent, though it happen perchance to be less prosperous in the issue.
 Plutarch, Parallel Lives (c. 100 AD). copy citation

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Author Plutarch
Source Parallel Lives
Topic repentance disappointment
Date c. 100 AD
Language English
Reference
Note Translated by A. H. Clough
Weblink http://www.gutenberg.org/files/674/674-h/674-h.htm

Context

“like greedy people, who, seizing on the more delicious morsels of any dish with a keen appetite, are presently disgusted when they grow full, and find themselves oppressed and uneasy now by what they before so greedily desired. For a succeeding dislike spoils the best of actions, and repentance makes that which was never so well done, become base and faulty; whereas the choice that is founded upon knowledge and wise reasoning, does not change by disappointment, or suffer us to repent, though it happen perchance to be less prosperous in the issue. And thus Phocion, of Athens, having always vigorously opposed the measures of Leosthenes, when success appeared to attend them, and he saw his countrymen rejoicing and offering sacrifice in honor of their victory, "I should have been as glad,"” source