A certain kind of good fortune generally attends self-made men to the last. It is their children of the first, or first and second, generation who are in greater danger, for the race can no more repeat its most successful performances suddenly and without its ebbings and flowings of success than the individual can do so, and the more brilliant the success in any one generation, the greater as a general rule the subsequent exhaustion until time has been allowed for recovery.

– Samuel Butler

The Way of All Flesh, Chapter 5.