Efficiency in a practical task is not proportional to the emotion that we put into it; indeed, emotion is sometimes an obstacle to efficiency.
 Bertrand Russell, The Conquest of Happiness (1930). copy citation

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Author Bertrand Russell
Source The Conquest of Happiness
Topic efficiency emotions
Date 1930
Language English
Reference
Note
Weblink http://russell-j.com/beginner/COH-TEXT.HTM

Context

“Even in the pursuit of really important objects it is unwise to become so deeply involved emotionally that the thought of possible failure becomes a constant menace to peace of mind. Christianity taught submission to the will of God, and even for those who cannot accept this phraseology there should be something of the same kind pervading all their activities. Efficiency in a practical task is not proportional to the emotion that we put into it; indeed, emotion is sometimes an obstacle to efficiency. The attitude required is that of doing one’s best while leaving the issue to fate. Resignation is of two sorts, one rooted in despair, the other in unconquerable hope. The first is bad; the second is good.” source