Bertrand Russell on the essential role of boredom and “fruitful monotony” in the conquest of happiness โ€“ sublimely timely read from 1930, which also includes the following gem:

The capacity to endure a more or less monotonous life is one which should be acquired in childhood. Modern parents are greatly to blame in this respect; they provide their children with far too many passive amusementsโ€ฆ and they do not realize the importance to a child of having one day like another, except, of course, for somewhat rare occasions.

Read more here.