The human animal, like others, is adapted to a certain amount of struggle for life [and] the mere absence of effort from his life removes an essential ingredient of happiness. [. . .] He forgets that to be without some of the things you want is an indispensable part of happiness.
Bertrand Russell (2013). “The Conquest of Happiness”, p.14, W. W. Norton & Company
![The human animal, like others, is adapted to a certain amount of struggle for life [and] the mere absence of effort from his life removes an essential ingredient of happiness. [. . .] He forgets that to be without some](http://cdn.quoteddaily.com/images/bertrand-russell/the-human-animal-like-others-is-adapted-to-a-certain-amount-of-struggle-for-life-and-the-mere-absence-of.jpg)