Bertrand Russell Quotes
The man who can forget his work when it is over and not remember it until it begins again next day is likely to do his work far better than the man who worries about it throughout the intervening hours.
Source: Bertrand Russell: The Conquest of Happiness, 1930, chap. 15：Impersonal interests
More info.： https://russell-j.com/beginner/HA26-010.HTM

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Everyone understands that overworking and exhausting one's nerves is bad for both health and work efficiency. However, working in a 'leisurely and sluggish' manner is also inefficient and wastes precious time. It takes some training for many people to be able to concentrate when necessary, avoid dawdling during other times, and, once the day's work is done, effectively switch off and refresh themselves.
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