Bertrand RussellQuotes（バートランド・ラッセルの名言・警句)

　

A boy or young man who has some serious constructive purpose will endure voluntarily a great deal of boredom if he finds that it is necessary by the way. But constructive purposes do not easily form themselves in a boy's mind if he is living a life of distractions and dissipations, for in that case his thoughts will always be directed towards the next pleasure rather than towards the distant achievement.
　Source:The Conquest of Happiness, 1930, chap.4: Boredom and excitement
　More info.:http://russell-j.com/beginner/HA14-060.HTM