
The root of the trouble springs from too much emphasis upon competitive success as the main source of happiness. ... What I do maintain is that success can only be one ingredient in happiness, and is too dearly purchased if all the other ingredients have been sacrificed to obtain it.
Source: TThe Conquest of Happiness, 1930, chap.3:Competition<
More info.:http://russell-j.com/beginner/HA13-040.HTM