Passions which work havoc in private life work havoc in public life also. It is not to be supposed that out of something as evil as envy good results will flow. Those, therefore, who from idealistic reasons desire profound changes in our social system, and a great increase of social justice, must hope that other forces than envy will be instrumental in bringing the changes about.
Source: The Conquest of Happiness, 1930, chap. 6: Envy
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